(2013). GUNS, GERMS,AND STEEL. NGHT LLC. PROGRAM.
Cita Chicago (17th ed.)GUNS, GERMS,AND STEEL. INDIA: NGHT LLC. PROGRAM, 2013.
Cita MLA (9th ed.)GUNS, GERMS,AND STEEL. NGHT LLC. PROGRAM, 2013.
Atenció: Aquestes cites poden no estar 100% correctes.