APA Style (7th ed.)
Per the APA Style rules, “the singular “they” is a generic third-person singular pronoun in English. Use of the singular “they” is endorsed as part of APA Style because it is inclusive of all people and helps writers avoid making assumptions about gender” (American Psychological Association, n.d., para. 1). For information on using inclusive pronouns, including different forms of "they" as a singular pronoun, please visit Singular ‘They’.
Reference
American Psychological Association. (n.d.). Singular "they". APA Style. https://apastyle.apa.org/style-grammar-guidelines/grammar/singular-they
