https://tex.stackexchange.com/q/531807/35864

compcite.tex

\documentclass{article}
\usepackage[natbibapa]{apacite}

\begin{filecontents}{\jobname.bib}
@article{citation1,
  author  = {Jane Smith},
  title   = {Lorem},
  journal = {Ipsum},
  volume  = {8},
  pages   = {40-52},
  year    = {2000},
}
@book{citation2,
  author    = {Jane Smith},
  title     = {Dolor},
  publisher = {Pub Pub},
  year      = {2006},
}
\end{filecontents}

\begin{document}

Something important has been shown \citep{citation1, citation2}.

\bibliographystyle{apacite}
\bibliography{\jobname}
\end{document}