Wilkins, David, 1971-, author
American Society for Training & Development, 2012
eBooks
Briggs, Leslie J.
Englewood Cliffs , 1981
Buku Teks
Artikel Jurnal
Brown, James Ward, 1934-, author
McGraw-Hill, 1977
Buku Teks
Huckabay, Loucine M. Daderian, author
Mosby Comp., 1980
Buku Teks