Ury William. (1991). Getting Past No: Negotiation With difficult People. Random House Business Books.
Style de citation Chicago (17e éd.)Ury William. Getting Past No: Negotiation With Difficult People. London: Random House Business Books, 1991.
Style de citation MLA (9e éd.)Ury William. Getting Past No: Negotiation With Difficult People. Random House Business Books, 1991.
Attention : ces citations peuvent ne pas être correctes à 100%.