Gaya APA
Knowles, M, S. et al (1998).
the Adult learner : Malcolm S. Knowles, Elwood F. Holton III, Tichard A. Swanson (5th ed.).
Woburn:
Butterworth Heinemann.
Gaya MLA
Knowles, Malcolm, S.. et al.
"the Adult learner : Malcolm S. Knowles, Elwood F. Holton III, Tichard A. Swanson".
5th ed.
Woburn:
Butterworth Heinemann,
1998.
Buku.