APA (7th ed.) Citation

Ryan, W. D. (1930). Miner's ounce of prevention, operator's pound of cure. [publisher not identified].

Chicago Style (17th ed.) Citation

Ryan, W. D. Miner's Ounce of Prevention, Operator's Pound of Cure. Washington, D.C.: [publisher not identified], 1930.

MLA (9th ed.) Citation

Ryan, W. D. Miner's Ounce of Prevention, Operator's Pound of Cure. [publisher not identified], 1930.