edited Erica Frydenverg
Oxford University Press, 1999
Buku Teks SO
edited by Michael Banton
Tavistock Publications, 1973
Buku Teks
Miner, Nanette, author
[American Society for Training & Development Press, American Society for Training & Development Press], 2005
eBooks
Curran, Charles A.
Grune & Stratton, 1972
Buku Teks
Tilly, Liz, author
Learning Matters, 2011
Buku Teks