APA (7th ed.) Citation

Leitch, R. D., Sayers, R. R., & Yant, W. P. (1932). Character of drainage from mines in thick Freeport coal bed, Pennsylvania. [publisher not identified].

Chicago Style (17th ed.) Citation

Leitch, R. D., R. R. Sayers, and W. P. Yant. Character of Drainage from Mines in Thick Freeport Coal Bed, Pennsylvania. Washington, D.C.: [publisher not identified], 1932.

MLA (9th ed.) Citation

Leitch, R. D., et al. Character of Drainage from Mines in Thick Freeport Coal Bed, Pennsylvania. [publisher not identified], 1932.