Rehan Wira Widyatna, author
Fakultas Teknik Universitas Indonesia, 2021
UI - Dokumentasi
Cope, Mick, author
Financial Times Prentice Hall, 2003
Buku Teks
Weiss, Alan, author
John Wiley & Sons, 2009
Buku Referensi
Gendelman, Joel, author
ASTD Press, 2010
Buku Teks
American Psychological Assosiation, 2007
Majalah, Jurnal, Buletin