APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

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

MLA (9th ed.) Citation

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