APA aipamena

Gardner, E. S. (1957). The case of the drowning duck. Penguin.

Chicago Style aipamena

Gardner, Erle Stanley. The Case of the Drowning Duck. Penguin, 1957.

MLA aipamena

Gardner, Erle Stanley. The Case of the Drowning Duck. Penguin, 1957.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.