Van Horne, James C. (James Carter), 1935-, author
Prentice Hall International, 1998
Buku Teks
Lasher, William R., author
Western College Publishing , 2000
Buku Teks
Brigham, Eugene F., 1930-, author
Dryden Press, 1985
Buku Teks
Bradley, Joseph F., author
Holt, Rinehart and Winston, 1969
Buku Teks
Bradley, Joseph F., author
Dryden Press, 1974
Buku Teks