Cita APA (7th ed.)

Childs, J. J. (1969). Principles of numerical control (2nd ed.). Industrial Press.

Cita Chicago (17th ed.)

Childs, James J. Principles of Numerical Control. 2nd ed. New York: Industrial Press, 1969.

Cita MLA (9th ed.)

Childs, James J. Principles of Numerical Control. 2nd ed. Industrial Press, 1969.