APA (7th ed.) Citation

Sayers, R. R. (1932). Physiological factors in mine ventilation in 1931. [publisher not identified].

Chicago Style (17th ed.) Citation

Sayers, R. R. Physiological Factors in Mine Ventilation in 1931. Washington, D.C.: [publisher not identified], 1932.

MLA (9th ed.) Citation

Sayers, R. R. Physiological Factors in Mine Ventilation in 1931. [publisher not identified], 1932.

Warning: These citations may not always be 100% accurate.