APA (7th ed.) Citation

Frick, H.C., Coke Co, & Spring, S. N. (1906). Forest planting on coal lands in western Pennsylvania. [publisher not identified].

Chicago Style (17th ed.) Citation

Frick, H.C., Coke Co, and Samuel N. Spring. Forest Planting on Coal Lands in Western Pennsylvania. Washington, D.C.: [publisher not identified], 1906.

MLA (9th ed.) Citation

Frick, H.C., Coke Co, and Samuel N. Spring. Forest Planting on Coal Lands in Western Pennsylvania. [publisher not identified], 1906.