Gaya APA

Williamson, B, H. (1996). The ASTD Trainer`s Sourcebook Supervision:Create Your Own Training Program . New York: McGraw-Hill Inc..

Gaya MLA

Williamson, Bobette, Hays. "The ASTD Trainer`s Sourcebook Supervision:Create Your Own Training Program". New York: McGraw-Hill Inc., 1996. Hibah Buku Dra. Anita Lestari,.