Beach, Dale S.
Macmillan, 1975
Buku Teks SO
Flippo, Edwin B.
McGraw-Hill, 1984
Buku Teks
Jucius, Michael J.
Richard D. Irwin, 1949
Buku Teks SO
Werther, William B.
McGraw-Hill, 1993
Buku Teks
Chruden, Herbert J.
South-Western Publishing, 1966
Buku Teks