Cita APA (7a ed.)

Hamolsky, S. L. (1955). Improve your English conversation. American Book.

Cita Chicago Style (17a ed.)

Hamolsky, Sidney L. Improve Your English Conversation. New York, [etc.]: American Book, 1955.

Cita MLA (9a ed.)

Hamolsky, Sidney L. Improve Your English Conversation. American Book, 1955.