Anmol Publications PVT, 1999
Buku Teks
edited by M.D. Jitendra
Anmol Publications,
Buku Referensi
UNDP and ESCAP , 1987
Buku Teks
Shackelford, Bill
American Society for Training and Development Press;, 2004
eBooks
Thorne, Kaye
Crest publishing, 1999
Buku Referensi