APA (7th ed.) Citation

Thom, W. T. (1929). Petroleum and coal: The keys to the future. Princeton university press.

Chicago Style (17th ed.) Citation

Thom, W. T. Petroleum and Coal: The Keys to the Future. Princeton: Princeton university press, 1929.

MLA (9th ed.) Citation

Thom, W. T. Petroleum and Coal: The Keys to the Future. Princeton university press, 1929.

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