Et al. and APA style

https://www.scribendi.com/academy/articles/how_to_use_et_al.en.html#:~:text=The%20phrase%20%22et%20al.%22,and%20in%20the%20reference%20list.

https://www.editage.com/insights/using-et-al-for-in-text-citations-in-research-papers

https://www.scribbr.com/citing-sources/et-al/

https://academicguides.waldenu.edu/writingcenter/apa/citations/etal

https://blog.apastyle.org/apastyle/2011/11/the-proper-use-of-et-al-in-apa-style.html

https://owl.purdue.edu/owl/research_and_citation/apa6_style/apa_formatting_and_style_guide/in_text_citations_author_authors.html