Boyd, Branford B., author
McGraw-Hill , 1984
Buku Teks
Haimann, Theo, author
South-Western Pub., 1982
Buku Teks
Leonard , Edwin C., Jr., author
South-Western Cengage Learning, 2013
Buku Teks
Kay, Brian R.
McGraw-Hill Book Company, Inc, 1961
Buku Teks
American Management Association, 1957
Buku Teks