APA

Roberts A. W., Varberg D. E., . (1982). Faces of mathematics: an introductory course for college students. New York: Harper & Row.

Chicago

Roberts A Wayne, Varberg Dale E, . 1982. Faces of mathematics: an introductory course for college students. New York: Harper & Row.

Harvard

Roberts A. W., Varberg D. E., . (1982). Faces of mathematics: an introductory course for college students. New York: Harper & Row.

MLA

Roberts A Wayne, Varberg Dale E, . Faces of mathematics: an introductory course for college students. New York: Harper & Row. 1982.