Cita APA (7a ed.)

Ludwing, A. M. (1980). Principles of clinical psychiatry. The Free Press.

Cita Chicago Style (17a ed.)

Ludwing, Arnold M. Principles of Clinical Psychiatry. The Free Press, 1980.

Cita MLA (9a ed.)

Ludwing, Arnold M. Principles of Clinical Psychiatry. The Free Press, 1980.