Phillips, Jean, author
South-Western Cengage Learning, 2012
Buku Teks
Bianco-Mathis, Virginia, author
American Society for Training & Development, 2008
eBooks
Artikel Jurnal
Lindesay, Vane
Oxford university press, 1983
Buku Teks
Lindesay, Vane
Oxford university press, 1983
Buku Teks