# How to remove square brackets around the note field using Biblatex style=apa?

I use biber and biblatex with the apa style. It puts the note field in square brackets. Is it possible to remove the square brackets? My code:

\documentclass[12pt,a4paper]{article}
\usepackage[british, english]{babel}
\usepackage[babel]{csquotes}

\usepackage[backend=biber,style=apa, sorting=nyt]{biblatex}

\begin{document}
some ext \parencite{WorldHealthOrganization.2020}
\newpage
\end{document}


My bib-file:

@misc{WorldHealthOrganization.2020,
abstract = {Fact sheet on family planning providing key facts and information on benefits of family planning, who provides family planning, contraceptive use, unmet need, contraceptive methods and WHO response.},
author = {{World Health Organization}},
year = {2020},
title = {{Family planning/contraception methods}},
url = {https://www.who.int/news-room/fact-sheets/detail/family-planning-contraception},
urldate = {2020-06-23},
note = {Institute for the Study of Labor (IZA)}
}



These brackets are not in the usual Biblatex styles, so it's something special in the APA style. Looking in apa.bbx there is this definition:

% Additional post title information in brackets
\printtexte[brackets]{%
\iffieldbibstring{entrysubtype}
{\bibcplstring{\thefield{entrysubtype}}}
{\printfield{entrysubtype}}%
\printfield{note}}}


So if you want to change that you can redefine this (with \renewbibmacro to change an existing one) to a version without that \printtexte:

\documentclass[12pt,a4paper]{article}
\usepackage[british, english]{babel}
\usepackage[babel]{csquotes}

\usepackage[backend=biber,style=apa, sorting=nyt]{biblatex}

% Almost as in apa.bbx
%% \printtexte[brackets]{%
\iffieldbibstring{entrysubtype}
{\bibcplstring{\thefield{entrysubtype}}}
{\printfield{entrysubtype}}%
\printfield{note}
%% }
}

\begin{document}
some ext \parencite{WorldHealthOrganization.2020}
\newpage

• I suggest you remove \printtexte[]{ from addinfo2 entirely. It does some quite tricky things behind the scenes to find out whether or not its argument contains something to print. Since \printtexte applies not formatting here that test is pointless. – moewe Jun 24 '20 at 18:53