McDermott, Lynda Caryl, author
Prentice-Hall, 1992
Buku Teks
Haneberg, Lisa, author
American Society for Training & Development, 2011
eBooks
Niles, Mary Cushing Howard
Harper & Brothers, 1940
Buku Teks
Haneberg, Lisa, author
American Society for Training & Development, 2010
eBooks
Allen, H.B., author
Cornell University Press, 1953
Buku Teks