Cfrgtkky

This question is similar to this question though I can't figure out how to modify the code to suit my purpose. I have the following:

begin{filecontents*}{jobname.bib}

@book{Doe2013,

    title = {Title I},

    author = {Doe, John},

    publisher = {Void},

    year = {2013}

  }

@book{Doe2014,

    title = {Title II},

    author = {Doe, John},

    publisher = {Void},

    year = {2014}

  }

@book{Doe2015,

    title = {Title III},

    author = {Doe, John},

    publisher = {Void},

    year = {2015}

  }

end{filecontents*}



documentclass{article}

usepackage{multibib}

newcites{ll}{Subsection of A}

usepackage{xcolor}

usepackage{hyperref}

    hypersetup{

        colorlinks = true,

        linkbordercolor = {white},

    allcolors=cyan

}

usepackage{etoolbox}

makeatletter

patchcmd{thebibliography}{%

  chapter*{bibname}@mkboth{MakeUppercasebibname}{MakeUppercasebibname}}{%

  section{References}}{}{}

makeatother

usepackage[authoryear,sort,round]{natbib}

renewcommandrefname{Bibliography}

renewcommand{bibsection}{section{bibname}}



begin{document}

section{PART A}

A reference to citell{Doe2013} and citepll{Doe2014}, and another to citep{Doe2015}.



bibliographystylell{plainnat}

bibliographyll{BibProb}



section{PART B}

Same reference to citell{Doe2013}, but also to cite{Doe2015}.



renewcommand{refname}{Bibliography}

bibliographystyle{plainnat}

bibliography{BibProb}

end{document}

Which produces:

I would like to have the first bibliography "2 Subsection of A" numbered as 1.1, that is, as a subsection of "1 PART A."

The current code defines the bibliography to be a section (renewcommand{bibsection}{section{bibname}}). What you have to do is to change the definition to create a subsection i.e. before part 1 (i.e.,
renewcommand{bibsection}{subsection{bibname}}) and then change the definition to section after part A, but before part B. So, what you need is something like:

begin{document}

section{PART A}

A reference to citell{Doe2013} and citepll{Doe2014}, and another to citep{Doe2015}.



renewcommand{bibsection}{subsection{bibname}}

bibliographystylell{plainnat}

bibliographyll{BibProb}



section{PART B}

Same reference to citell{Doe2013}, but also to cite{Doe2015}.



renewcommand{bibsection}{section{bibname}}

renewcommand{refname}{Bibliography}

bibliographystyle{plainnat}

bibliography{BibProb}

end{document}