APA (7th ed.) Citation

Stangle, P. L. (1967). An investigation of critical factors in numerical-control machine tool operation. [publisher not identified].

Chicago Style (17th ed.) Citation

Stangle, Paul Leo. An Investigation of Critical Factors in Numerical-control Machine Tool Operation. [Place of publication not identified]: [publisher not identified], 1967.

MLA (9th ed.) Citation

Stangle, Paul Leo. An Investigation of Critical Factors in Numerical-control Machine Tool Operation. [publisher not identified], 1967.