# Is it possible to remove the comma that appears before an in-text citation note?

I am using natbib and the apacite style. I want to cite Descartes' Meditations, and one standard way of doing it involves an in-text citation of the form '(CSM 25)'. I managed to use the alias system to get '(CSM, 25)', but I don't know how to remove the comma. Is there a way to remove the comma to get '(CSM 25)'? The following is my code for the citation followed by my code for the .bib file:

\defcitealias{Meditations}{CSM}
\citepalias[][25]{Meditations}

@book{Meditations,
author = {Rene Descartes},
year = {1985},
title = {The Philosophical Writings of {Descartes}, Vol. 2},
translator = {John Cottingham and Robert Stoothoff and Dugald Murdoch},
publisher = {Cambridge University Press},
originalyear = {1641},
}


Thank you.

• Welcome to TeX.SE. Please provide more information about your document, including the document class , any citation management packages, and the bibliography style you employ. (Aside: the apacite bibliography style should be used alongside the apacite citation manatement package.) Please also clarify what the number 25 in \citepalias[][25]{Meditations} denotes: a page number? something else? – Mico Dec 30 '20 at 8:39
• The document class is 'report'. The citation packages are: \usepackage[natbibapa]{apacite} \bibliographystyle{apacite} The number 25 is for the section number. It is in the margin and covers 1-2 paragraphs. It is distinct from the page number. I had to switch to natbib from apacite because apacite wasn't allowing me to do multiple authors in an in-text citation with their own page numbers. I'm sticking to this package now. – Sikander Dec 31 '20 at 16:47

Since you use the apacite citation management package with the option natbibapa, you can issue a directive such as \setcitestyle{notesep={ }} to change the separator between the (aliased) citation callout and the subsequent note.

\documentclass{article}
% using 'article' rahter than 'report' to keep all output on the same page

\begin{filecontents}[overwrite]{mybib.bib}
@book{Meditations,
author       = {René Descartes},
year         = {1985},
title        = {The Philosophical Writings of {Descartes}, {Vol.~2}},
translator   = {John Cottingham and Robert Stoothoff and Dugald Murdoch},
publisher    = {Cambridge University Press},
originalyear = {1641},