APA

Fisher R., Ury W., . (1987). Getting to yes. New York: Penguin Books.

Chicago

Fisher Roger, Ury William, . 1987. Getting to yes. New York: Penguin Books.

Harvard

Fisher R., Ury W., . (1987). Getting to yes. New York: Penguin Books.

MLA

Fisher Roger, Ury William, . Getting to yes. New York: Penguin Books. 1987.