Gaya APA
Whitaker, U., Keeton, M. (1989).
Assessing Learning: Standards, Principles, and Procedures .
Philadelphia:
Council for Adult and Experiential Learning (CAEL).
Gaya MLA
Whitaker, Urban., Keeton, Morris.
"Assessing Learning: Standards, Principles, and Procedures".
Philadelphia:
Council for Adult and Experiential Learning (CAEL),
1989.
Art Original.