Cita APA (7a ed.)

Watts, E. F. (1946). Descriptive geometry. Prentice- Hall inc..

Cita Chicago Style (17a ed.)

Watts, Earle F. Descriptive Geometry. New York: Prentice- Hall inc., 1946.

Cita MLA (9a ed.)

Watts, Earle F. Descriptive Geometry. Prentice- Hall inc., 1946.