Cita APA (7th ed.)

Fisher, R., & Ury,William. (1991). Getting to yes: Negotiating agreement without giving in (2nd ed.). Penguin Books.

Cita Chicago (17th ed.)

Fisher, Roger, i Ury,William. Getting to Yes: Negotiating Agreement Without Giving in. 2nd ed. New York: Penguin Books, 1991.

Cita MLA (9th ed.)

Fisher, Roger, i Ury,William. Getting to Yes: Negotiating Agreement Without Giving in. 2nd ed. Penguin Books, 1991.