Pozen, Robert C.
St.Paul, Minn, 1978
Buku Teks SO
Greene, Mark R.
South-Western Publishing CO., 1983
Buku Teks SO
Black, James Menzies
McGraw-Hill Kogakusha, 1975
Buku Teks
Atwood, Christee Gabour
American Society for Training & Development, 2009
eBooks
Evans, G. Edward, 1937-
Neal-Schuman, 2013
Buku Teks SO