Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

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