Cita APA

Freud ,Sigmund. (1991). On sexuality. Penguin Books.

Citación estilo Chicago

Freud ,Sigmund. On Sexuality. Penguin Books: Penguin Books, 1991.

Cita MLA

Freud ,Sigmund. On Sexuality. Penguin Books, 1991.

Warning: These citations may not always be 100% accurate.