Dyfyniad APA

Leffler, W. L., Pattarozzi, R., & Sterling, G. (2003). Deepwater petroleum exploration & production: A nontechnical guide. PennWell Corporation.

Dyfyniad Arddull Chicago

Leffler, William L., Richard Pattarozzi, and Gordon Sterling. Deepwater Petroleum Exploration & Production: A Nontechnical Guide. Tulsa, Oklahoma: PennWell Corporation, 2003.

Dyfyniad MLA

Leffler, William L., et al. Deepwater Petroleum Exploration & Production: A Nontechnical Guide. PennWell Corporation, 2003.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.