Ury William. (1991). Getting Past No: Negotiation With difficult People. Random House Business Books.
Цитирование в стиле Чикаго (17-е изд.)Ury William. Getting Past No: Negotiation With Difficult People. London: Random House Business Books, 1991.
Цитирование MLA (9-е изд.)Ury William. Getting Past No: Negotiation With Difficult People. Random House Business Books, 1991.
Предупреждение: эти цитированмия не могут быть всегда правильны на 100%.