APA (7th ed.) Citation

Marek, R. L. (1932). Selecting and training refinery personnel to prevent accidents. [publisher not identified].

Chicago Style (17th ed.) Citation

Marek, Ralph Leo. Selecting and Training Refinery Personnel to Prevent Accidents. Washington, D.C.: [publisher not identified], 1932.

MLA (9th ed.) Citation

Marek, Ralph Leo. Selecting and Training Refinery Personnel to Prevent Accidents. [publisher not identified], 1932.