Cita APA (7a ed.)

Freeman, C., & Tyrer, P. (1998). Research methods in psychiatry: A beginner's guide (2nd ed.). Gaskell.

Cita Chicago Style (17a ed.)

Freeman, Chris, y Peter Tyrer. Research Methods in Psychiatry: A Beginner's Guide. 2nd ed. London: Gaskell, 1998.

Cita MLA (9a ed.)

Freeman, Chris, y Peter Tyrer. Research Methods in Psychiatry: A Beginner's Guide. 2nd ed. Gaskell, 1998.