Gaya APA

Kirpatrick, D, L. (2006). Evaluating Training Programs: the Four Levels (Third Edition). San Francisco: Berrent-Koehler Publishers.

Gaya MLA

Kirpatrick, Donald, L.. "Evaluating Training Programs: the Four Levels". Third Edition San Francisco: Berrent-Koehler Publishers, 2006. Hibah Buku Dra. Anita Lestari,.