Gerstman, B. Burt
Massachusetts Jones & Bartlett Learning, 2015
Buku Teks
Freeman, Ruth B.
W.B. Saunders, 1969
Buku Teks SO
Friis, Robert H.
Jones and Bartlett, 2014
Buku Teks SO
edited by Cathy E. Lloyd ... [and others]
Sage, 2007
Buku Teks SO
edited by Lisa M. Lee... [and others]
oxford Univ Press, 2010
Buku Teks SO