APA 7th Edition

Journal article citation is covered in APA Manual, 7th Edition, Section 10.1, beginning at page 316.

Parenthetical in-text citation: 

(Cheon et al., 2020)

Narrative in-text citation:

Cheon et al. (2020)...

Note that the ampersand is used in the parenthetical form, but not the narrative form.

See APA Blog, https://apastyle.apa.org/style-grammar-guidelines/references/examples/journal-article-references