APA (7th ed.) Citation

Hosmaner, M., & Pietrobono, J. T. (1985). Coal mining: A PETEX primer. Petroleum Extension Service.

Chicago Style (17th ed.) Citation

Hosmaner, Max, and Jean Trimble Pietrobono. Coal Mining: A PETEX Primer. Austin, Texas: Petroleum Extension Service, 1985.

MLA (9th ed.) Citation

Hosmaner, Max, and Jean Trimble Pietrobono. Coal Mining: A PETEX Primer. Petroleum Extension Service, 1985.