APA (7th ed.) Zitazioa

Okara, G. The voice: With an introduction by arthur ravenscroft. Heinemann.

Chicago Style (17th ed.) Zitazioa

Okara, Gabriel. The Voice: With an Introduction by Arthur Ravenscroft. London: Heinemann.

MLA (9th ed.) Zitazioa

Okara, Gabriel. The Voice: With an Introduction by Arthur Ravenscroft. Heinemann.