Lee Ru Da, author
Fakultas Ilmu Pengetahuan dan Budaya Universitas Indonesia, 2018
UI - Makalah dan Kertas Kerja
Spradley, James P.
Halt, Rinehart and Winston, 1979
Buku Teks
Yoshio Futagawa, interviewer
A.D.A. Edita, 2002
Buku Teks
Morrison, James, author
The Guilford Press, 1995
Buku Teks
Grosse, Eric F., author
[American Society for Training & Development Press, American Society for Training & Development Press], 2002
eBooks