Cita APA (7th ed.)
Obert, E. F. (1968). Internal combustion engines (3d ed.). International Textbook Company.
Cita Chicago (17th ed.)
Obert, Edward F. Internal Combustion Engines. 3d ed. Scranton: International Textbook Company, 1968.
Cita MLA (9th ed.)
Obert, Edward F. Internal Combustion Engines. 3d ed. International Textbook Company, 1968.
Atenció: Aquestes cites poden no estar 100% correctes.