Cita APA (7a ed.)

Speer, D. C. (1972). Nonverbal communication. Sage Publications.

Cita Chicago Style (17a ed.)

Speer, David C. Nonverbal Communication. Beverly Hills: Sage Publications, 1972.

Cita MLA (9a ed.)

Speer, David C. Nonverbal Communication. Sage Publications, 1972.