Cita APA (7a ed.)

Ewing, A. W. G., & Ewing, E. C. L. (1967). Hearing aids, lipreading and clear speech. Manchester University Press.

Cita Chicago Style (17a ed.)

Ewing, Alexander William Gordon, y Ethel Constance Lady Ewing. Hearing Aids, Lipreading and Clear Speech. Manchester: Manchester University Press, 1967.

Cita MLA (8a ed.)

Ewing, Alexander William Gordon, y Ethel Constance Lady Ewing. Hearing Aids, Lipreading and Clear Speech. Manchester University Press, 1967.