APA (7th ed.) Citation

Fisher, R., Ury, W., & Patton, B. (1991). Getting to yes: Negotiating agreement without giving in (Second edition.). Penguin Books.

Chicago Style (17th ed.) Citation

Fisher, Roger, William Ury, and Bruce Patton. Getting to Yes: Negotiating Agreement Without Giving in. Second edition. New York: Penguin Books, 1991.

MLA (8th ed.) Citation

Fisher, Roger, et al. Getting to Yes: Negotiating Agreement Without Giving in. Second edition. Penguin Books, 1991.