APA (7th ed.) Citation

Marzillier, J. (1992). What is clinical psychology? (2nd ed.). Oxford university.

Chicago Style (17th ed.) Citation

Marzillier, John. What Is Clinical Psychology? 2nd ed. Oxford [etc.]: Oxford university, 1992.

MLA (9th ed.) Citation

Marzillier, John. What Is Clinical Psychology? 2nd ed. Oxford university, 1992.