Cita APA (7th ed.)

Ury, W. (1991). Getting past no: Negotiating with difficult people. Bantam Books.

Cita Chicago (17th ed.)

Ury, William. Getting Past No: Negotiating with Difficult People. New York: Bantam Books, 1991.

Cita MLA (9th ed.)

Ury, William. Getting Past No: Negotiating with Difficult People. Bantam Books, 1991.