Kroenke, David M., 1946-, author
Mitchell Publishing, 1987
Buku Teks
Boutell, Wayne S.
University of California Press , 1966
Buku Teks
Kember. N.F., author
Edward Arnold, 1984
Buku Teks
by William O. Rasmussen ...[et al.]
Westview Press, 1985
Buku Teks
Prasannan
Cadco Management services, 1982
Buku Teks