Cita APA (7th ed.)

Nichols, R. G., & Stevens, L. A. (1957). Are you listening? McGraw-Hill.

Cita Chicago (17th ed.)

Nichols, Ralph G., i Leonard A. Stevens. Are You Listening? New York: McGraw-Hill, 1957.

Cita MLA (8th ed.)

Nichols, Ralph G., i Leonard A. Stevens. Are You Listening? McGraw-Hill, 1957.