dblatex citestyle
<?dblatex
             citestyle?> — Sets Natbib Citation Style
Synopsis
<?dblatex citestyle="\citep[see][chap.  #2]"?>
Description
Applies the given natbib citation command to a citation.  As
    the value of citestyle is a LaTeX command,
    if square brackets “[ ]” are part of the citation
    text then the text must be enclosed in curly brackets “{
    }” to protect them.
Context
Recognized in the citation element, only
    when the citation.natbib.use parameter is set to
    1.