Duffy, K. G. (1990). Personal growth and behavior 90/91. Dushkin.
Chicago-čujuhus (17. p.)Duffy, Karen G. Personal Growth and Behavior 90/91. Dushkin, 1990.
MLA-čujuhus (9. p.)Duffy, Karen G. Personal Growth and Behavior 90/91. Dushkin, 1990.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.