Plunkett, Warren R.
Kent Publishing, 1983
Buku Teks
Weihrich, Heinz, author
McGraw-Hill , 1985
Buku Teks
Henshaw, Richard C., author
Richard D. Irwin , 1972
Buku Teks
Harvey, Thomas R.
Allyn and Bacon, 1990
Buku Teks
Fox, Roy
McGraw-Hill, 1991
Buku Teks