Petit, Thomas A.
John Weatherhill, Inc., 1975
Buku Teks
Finkler, Steven A., author
WB. Saunders, 2000
Buku Teks
Donelly, James H., author
Business Publications, 1984
Buku Teks
Donnelly, James H., author
Business Publications, 1981
Buku Teks
Donnelly, James H., author
McGraw-Hill , 1998
Buku Teks