APA-viite

Freud, S. (1991). Jokes and their relation to the unconscious. Penguin Books.

Chicago-tyylinen lähdeviittaus

Freud, Sigmund. Jokes and Their Relation to the Unconscious. England: Penguin Books, 1991.

MLA-viite

Freud, Sigmund. Jokes and Their Relation to the Unconscious. Penguin Books, 1991.