biblatex: reference both by chapter and at the end of the book

Question

I currently print my references after the end of each chapter, using:

\usepackage[backend=biber,
    bibencoding=utf8,
    refsection=chapter,
    style=numeric, 
    firstinits=true,
    isbn=false,
    doi=true,
    url=false,
    clearlang=true
]{biblatex}

and

\printbibliography[heading=subbibliography]

at the end of each chapter.

I would like to have also a chapter at the end of the book with all cited references. How could I do ?

Answer 1

We can use refsegment instead of refsection (read about refsection and refsegment in the biblatex documentation §3.6.5 Bibliography Sections & §3.6.6 Bibliography Segments, pp. 78-79).

Instead of refsection=chapter we pass refsegment=chapter to biblatex, we also issue defernumbers=true (you can find out more about defernumbers on p. 53 of the doc).

We then have to specify the segment in the per-chapter bib manually, but this can be automated with \therefsegment, so the chapter-bibliographies are

\printbibliography[segment=\therefsegment,heading=subbibliography]

The full end-document bib is created by

\printbibliography

MWE

\documentclass{book}
\usepackage[backend=biber,
    bibencoding=utf8,
    refsegment=chapter,
    style=numeric, 
    firstinits=true,
    isbn=false,
    doi=true,
    url=false,
    clearlang=true,
    defernumbers=true,
]{biblatex}

\addbibresource{biblatex-examples.bib}

\begin{document}
\tableofcontents

\chapter{Ch 1}
A citation \cite{wilde}.
\printbibliography[segment=\therefsegment,heading=subbibliography]

\chapter{Ch 2}
And another one \cite{cicero}.
\printbibliography[segment=\therefsegment,heading=subbibliography]

\printbibliography
\end{document}