Citazione Stile APA (7a Edizione)

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

Citazione stile Chigago Style (17a edizione)

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

Citatione MLA (9a ed.)

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