Cita APA (7th ed.)
Hamilton, C. W., & Schoenke, B. Oil Tales of Mexico. Gulf.
Cita Chicago (17th ed.)
Hamilton, Charles W., i Bob Schoenke. Oil Tales of Mexico. Houston, EUA: Gulf.
Cita MLA (9th ed.)
Hamilton, Charles W., i Bob Schoenke. Oil Tales of Mexico. Gulf.
Atenció: Aquestes cites poden no estar 100% correctes.