Cita APA (7a ed.)

Watts, E. F., & Rule, J. T. (1946). Descriptive geometry. Prentice Hall.

Cita Chicago Style (17a ed.)

Watts, Earle F., y John T. Rule. Descriptive Geometry. New York: Prentice Hall, 1946.

Cita MLA (9a ed.)

Watts, Earle F., y John T. Rule. Descriptive Geometry. Prentice Hall, 1946.