Cita APA (7th ed.)

Potter, R. K., Kopp, G. A., & Kopp, H. G. (1966). Visible speech. Dover Publications.

Cita Chicago (17th ed.)

Potter, Ralph K., George A. Kopp, i Harriet G. Kopp. Visible Speech. Nueva York: Dover Publications, 1966.

Cita MLA (9th ed.)

Potter, Ralph K., et al. Visible Speech. Dover Publications, 1966.