Cita APA (7a ed.)

Penrose, L. S. (1934). Mental defect. Farrar & Rinehart, Inc.

Cita Chicago Style (17a ed.)

Penrose, Lionel Sharples. Mental Defect. New York: Farrar & Rinehart, Inc, 1934.

Cita MLA (9a ed.)

Penrose, Lionel Sharples. Mental Defect. Farrar & Rinehart, Inc, 1934.