Krovetz, Martin L., author
Corwin Press, 1999
Buku Teks
Cowan, Stella Louise, author
American Society for Training & Development, 2012
eBooks
Abdul Gafur, author
Secretariate of the Minister of Youth Affairs, Ministry of Education and Culture, 1978
Buku Teks
Chwee Beng Lee, David Jonassen, editor
Cengage Learning, 2013
Buku Teks
Maddaremmeng A. Panennungi, editor
Universitas Indonesia, 2013
Buku Teks