APA (7th ed.) Citation

Leffler, W. L. (2020). PETROLEUM REFINING IN NONTECHNICAL LANGUAGE (Fifth edition.). PennWell.

Chicago Style (17th ed.) Citation

Leffler, William L. PETROLEUM REFINING IN NONTECHNICAL LANGUAGE. Fifth edition. Tulsa, Oklahoma: PennWell, 2020.

MLA (9th ed.) Citation

Leffler, William L. PETROLEUM REFINING IN NONTECHNICAL LANGUAGE. Fifth edition. PennWell, 2020.

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