I have a problem with the bibliography for my project.

I have the following preamble:

\usepackage[backend=biber, style=authoryear,

However, this produces (Author(s), n.d.) in the citation call-out whenever there is no "year" typed in the bib entry. How can I remove this whenever a year is not available.

  • 1
    Welcome to TeX.SE. Specifying the option style=authoryear raises the expectation, at least implicitly, that each bib entry will have a non-empty date or year field. If your bibliography has entries without date or year fields, you may want to re-think the wisdom of specifying the option style=authoryear.
    – Mico
    Dec 18, 2017 at 15:35
  • Thank you. What do you propose I use instead if I want to have the author and year still displayed? Dec 18, 2017 at 15:36
  • 2
    The fundamental issue is: How (and why) is biblatex supposed to display the year of the publication if no year-related information is provided? The best (and only!) thing biblatex can do under such circumstances is to display n.d., which is short for "no date". A general observation: If there truly is no year-related information for some publication, it's better to say so explicitly than it is to create some ambiguity as to what the publication date may be.
    – Mico
    Dec 18, 2017 at 15:57
  • Aside: If you want to create a citation call-out that shows just the author(s) of the publication, you could use the command citeauthor. This works irrespective of whether or not the year-related information is available.
    – Mico
    Dec 18, 2017 at 15:59
  • I already knew that but thank you. My question was, however: Is there a way to make a LaTeX command that changes this style to another that only displays the Author whenever the year is not obtainable? Dec 18, 2017 at 16:00

1 Answer 1


Will not show the 'n.d.' in case no year is given, it will instead show nothing if the citation is the only work by the author or a letter if there are several works by that author. If you want the title to disambiguate several works by the same author, replace \printfield{extradate} with \iffieldundef{extradate}{}{\printfield[citetitle]{labeltitle}}.

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