Cita APA (7th ed.)
Hearn, P. (1979). Successful negotiation of commercial contracts. Oyez.
Cita Chicago (17th ed.)
Hearn, Patrick. Successful Negotiation of Commercial Contracts. London: Oyez, 1979.
Cita MLA (9th ed.)
Hearn, Patrick. Successful Negotiation of Commercial Contracts. Oyez, 1979.
Atenció: Aquestes cites poden no estar 100% correctes.