Juma, Calestous
UN Millenium Project, 2005
Buku Teks
Newman, Amy
[American Society for Training & Development Press, American Society for Training & Development Press], 1999
eBooks
Chinn, Peggy L. (Peggy Lois), 1941-
Mosby , 2008
Buku Teks
Saeed, Saqib
Information Science Reference, 2013
Buku Teks
Chinn, Peggy L. (Peggy Lois), 1941-
Elsevier , 2015
Buku Teks