Bibliography in 3 columns

Question

My bibliography should look like this:

Could someone tell me how do I get 3 columns? This is my code:

    %Dokumentklasse
\documentclass[a4paper,11pt, pointlessnumbers,  twoside, numbers=noenddot, captions=nooneline]{scrreprt}

%===Modifizierungen Inhaltsverzeichnis===%
\usepackage{tocloft} 

%\usepackage{etoolbox}
%\patchcmd{\l@chapter}{#1}{\uppercase{#1}}{}{}% 
%\makeatother 


%===Standard Packages===%
%Umlaute, etc.
\usepackage[utf8]{inputenc} 
\usepackage[ngerman]{babel}
\usepackage[T1]{fontenc}
\usepackage{graphicx, subfig}
\graphicspath{{img/}}
\usepackage{lmodern}
\usepackage{color}
\usepackage[german]{varioref}
\usepackage{fancyhdr}
\usepackage{tabularx}
\usepackage{rotating}
\usepackage{lscape}
\usepackage{multirow}
\usepackage{lipsum}

% zusätzliche Schriftzeichen der American Mathematical Society
\usepackage{amsmath,amssymb,amsthm}
\usepackage{amsfonts}

% ============= Dokumentbeginn =============

\begin{document}

\include{01_titel}

\include{02_danksagungen}

\include{03_aufgabenstellung}


\tableofcontents

% pagestyle für gesamtes Dokument aktivieren
%\pagestyle{fancy}


\include{04_einleitung}

\include{05_grundlagen}

\include{06_konstruktionsprozess}

\include{07_methoden}

\include{08_ergebnisse}

\include{09_diskussion}

%===Abbildungsverzeichnis===%
\listoffigures


%===Tabellenverzeichnis===%
\listoftables


%===Literaturverzeichnis===%
\bibliographystyle{unsrtdin}
\bibliography{Literatur}

\end{document}

Answer 1

Here is a solution based on my biblatex-ext-tabular package, which is part of biblatex-ext. The code was originally inspired and largely taken from Audrey's answer to tabular bibliography with biblatex.

Of course this approach requires biblatex instead of BibTeX, but that should hopefully be an acceptable requirement.

With \defbibtabular we define our new three-column tabular bibliography. Before we can do that we need a small auxiliary macro tabular:labelnumber that prints the citation label as in a normal numeric bibliography.

The first two arguments to \defbibtabular{bibtabular} set up the beginning and the end of the environment and are more or less straightforward. The third argument sets up the code for each line in the bibliography. The macros tabular:sortname and tabular:omitsortname were specifically designed to allow for the primary/sort-names to be distributed over two columns.

\documentclass[ngerman]{article}
\usepackage[T1]{fontenc}
\usepackage[utf8]{inputenc}
\usepackage{babel}
\usepackage{csquotes}

\usepackage[style=ext-numeric, backend=biber]{biblatex}
\usepackage{biblatex-ext-tabular}

\DeclareNameAlias{sortname}{family-given}

\newbibmacro{tabular:labelnumber}{%
  \printtext[labelnumberwidth]{%
    \printfield{labelprefix}%
    \printfield{labelnumber}}}

\usepackage{longtable}
\usepackage{array}
\newcolumntype{L}[1]{%
  >{\raggedright\let\newline\\\arraybackslash\hspace{0pt}}p{#1}}

\defbibtabular{bibtabular}
  {\setlength{\LTpre}{0pt}%
   \setlength{\LTpost}{0pt}%
   \renewcommand*{\arraystretch}{2}%
   \begin{longtable}{%
   @{}
   L{\dimexpr0.05\textwidth-\tabcolsep\relax}
   L{\dimexpr0.3\textwidth-2\tabcolsep\relax}
   L{\dimexpr0.65\textwidth-\tabcolsep\relax}
   @{}}}
  {\end{longtable}}
  {\anchorlang{\usebibmacro{tabular:labelnumber}} &
   \anchorlang{\usebibmacro{tabular:sortname}} &
   \driver{\usebibmacro{tabular:omitsortname}} \\}

\addbibresource{biblatex-examples.bib}

\begin{document}
\cite{sigfridsson,worman,nussbaum,geer,gaonkar:in}
\printbibtabular
\end{document}