Cita APA (7th ed.)

Parkin, K. (1969). Ideal voice and speech training: A book of exercises (Rev., with additional material.). S. French.

Cita Chicago (17th ed.)

Parkin, Ken. Ideal Voice and Speech Training: A Book of Exercises. Rev., with additional material. London ; New York: S. French, 1969.

Cita MLA (9th ed.)

Parkin, Ken. Ideal Voice and Speech Training: A Book of Exercises. Rev., with additional material. S. French, 1969.