APA (7th ed.) Citation

Trask, P. D., Hammar, H. E., & Wu, Z. (1932). Origin and environment of source sediments of petroleum.

Chicago Style (17th ed.) Citation

Trask, Parker D., Harald Edwin Hammar, and Zhaocheng Wu. Origin and Environment of Source Sediments of Petroleum. 1932.

MLA (9th ed.) Citation

Trask, Parker D., et al. Origin and Environment of Source Sediments of Petroleum. 1932.