APA (7th ed.) Citation

Duffy, K. G. (1998). Psychology 98/99 (28th ed.). Dushkin/McGraw-Hill.

Chicago Style (17th ed.) Citation

Duffy, Karen G. Psychology 98/99. 28th ed. Guilford: Dushkin/McGraw-Hill, 1998.

MLA (8th ed.) Citation

Duffy, Karen G. Psychology 98/99. 28th ed. Dushkin/McGraw-Hill, 1998.