For my thesis i need citations of the pdf in the appendix. I don’t know how to solve this properly

I tryed with the following part of the code.

includepdf[pages={1},pagecommand={section{XY}label{app:XY}}, scale=0.7]{XY.pdf}
cite{XY}


includepdf[pages={2-}, pagecommand={thispagestyle{headings}}, scale=0.7]{XY.pdf}

now the citation is on a blank page on itself, i would like to have it on the first page of the pdf. Maybe somebody knows some good ways to fix it.

Best regards.