APA (7th ed.) Citation

Collins, H. R. (1976). Coal production in Ohio: 1800 - 1974.

Chicago Style (17th ed.) Citation

Collins, Horace R. Coal Production in Ohio: 1800 - 1974. Columbus, 1976.

MLA (9th ed.) Citation

Collins, Horace R. Coal Production in Ohio: 1800 - 1974. 1976.

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