Chalofsky, Neal, author
American Society for Training & Development Press, 2001
eBooks
revision consultant, Stew Hickman
[American Society for Training and Development Press, American Society for Training and Development Press], 2001
eBooks
Linda B. Bourque, Evie P. Filelder
Thousand Oaks : SAGE PUBLIKATION, 2003,
Buku Referensi
Blankenship, Albert Breneman, 1914-, author
Harper & Brothers publishers, 1946
Buku Teks
Hodnett, Edward
Harper & Brothers, 1955
Buku Teks