Brown, Warren B.
John Wiley & Sons, 1980
Buku Teks
Kast, Fremont Ellsworth
McGraw-Hill Kogakusha, 1974
Buku Teks
Kast, Fremont Ellsworth
McGraw-Hill, 1981
Buku Teks
edited by Jay M. Shafritz, J. Steven Ott
Wadsworth, 2005
Buku Teks
editedby Jay M. Shafritz, J. Steven Ott
Brooks/Cole, 1991
Buku Teks