APA (7th ed.) Citation

Hernandez, R. (1968). Principles of psychology (Rev. ed.). U.S.T. Cooperative.

Chicago Style (17th ed.) Citation

Hernandez, Regina. Principles of Psychology. Rev. ed. [Manila]: U.S.T. Cooperative, 1968.

MLA (9th ed.) Citation

Hernandez, Regina. Principles of Psychology. Rev. ed. U.S.T. Cooperative, 1968.