Gillespie, Sheena, author
Allyn and Bacon , 1994
Buku Teks
Edmundson, Andrea, author
American Society for Training & Development, 2010
eBooks
Stevenson, Deborah, author
Open University Press, 2003
Buku Teks
Hall, Bradford J., author
Routledge, Taylor & Francis Group, 2018
Buku Teks
by Larry A. Samovar, Richard E Porter, Edwin R McDaniel, Carolyn S Roy
Wadsworth and Cengage Learning, 2013
Buku Teks