APA (7th ed.) Citation

Harper,W.M. (1991). c (6th.ed.). Prentice hall.

Chicago Style (17th ed.) Citation

Harper,W.M. C. 6th.ed. London: Prentice hall, 1991.

MLA (9th ed.) Citation

Harper,W.M. C. 6th.ed. Prentice hall, 1991.

Warning: These citations may not always be 100% accurate.