APA (7th ed.) Citation

Obert, E. F. (1968). Internal combustion engines (3a. ed.). International Textbook.

Chicago Style (17th ed.) Citation

Obert, Edward F. Internal Combustion Engines. 3a. ed. Scranton: International Textbook, 1968.

MLA (9th ed.) Citation

Obert, Edward F. Internal Combustion Engines. 3a. ed. International Textbook, 1968.