Tohutoro APA (7th ed.)
Hearn, P. (1979). Successful negotiation of commercial contracts. Oyez.
Tohutoru Kātū Chicago (17th ed.)
Hearn, Patrick. Successful Negotiation of Commercial Contracts. London: Oyez, 1979.
Tohutoro MLA (9th ed.)
Hearn, Patrick. Successful Negotiation of Commercial Contracts. Oyez, 1979.
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