Stanton, William J., author
Richard D. Irwin, 1964
Buku Teks
Shapiro, Benson P., author
McGraw-Hill, 1977
Buku Teks
Humphries, john
Groiler International, 1993
Buku Teks
Angela Siegfried, editor
American Society for Training & Development, 2010
eBooks
Cortada, James W., author
McGraw-Hill, 1993
Buku Teks