APA

Stone D. 1., Patton B. c., . (1999). Difficult conversations. New York: Penguin Books.

Chicago

Stone Douglas 1958, Patton Bruce coaut, . 1999. Difficult conversations. New York: Penguin Books.

Harvard

Stone D. 1., Patton B. c., . (1999). Difficult conversations. New York: Penguin Books.

MLA

Stone Douglas 1958, Patton Bruce coaut, . Difficult conversations. New York: Penguin Books. 1999.