Cita APA (7th ed.)

Croft, K. (1968). English pronunciation: A manual for teachers. Collier-Macmillan International.

Cita Chicago (17th ed.)

Croft, Kenneth. English Pronunciation: A Manual for Teachers. New York: Collier-Macmillan International, 1968.

Cita MLA (8th ed.)

Croft, Kenneth. English Pronunciation: A Manual for Teachers. Collier-Macmillan International, 1968.