APA-viite (7. p.)

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

Chicago-viite (17. p.)

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

MLA-viite (8. p.)

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