Cita APA (7th ed.)

Ripper, H. J. (1938). Vital speech: A study in perfect utterance. Methuen & Co., Ltd..

Cita Chicago (17th ed.)

Ripper, Harold J. Vital Speech: A Study in Perfect Utterance. London: Methuen & Co., Ltd., 1938.

Cita MLA (8th ed.)

Ripper, Harold J. Vital Speech: A Study in Perfect Utterance. Methuen & Co., Ltd., 1938.