Mason, Joseph G.
McGraw-Hill, 1971
Buku Teks
McGraw-hill book , 1950
Buku Teks
Roethlisberger, F.J.
Harvard University Press, 1956
Buku Teks
edited by Jay W. Lorsch and Paul R. Lawrence
Richard D. Irwin, 1972
Buku Teks
Del mar, Donald
McGraw-Hill, 1985
Buku Teks