Allen, Carol Vestall, author
Appleton & Lange, 1997
Buku Teks
Allen, Carol Vestall, author
Appleton & Lange, 1997
Buku Teks SO
Hoover, Stewart V., author
Addison-Wesley, 1990
Buku Teks SO
Laudon, Kenneth C., 1944-, author
The Dryden Press , 1995
Buku Teks
Smith, Marilyn Z., author
Houghton-Mifflin, 1974
Buku Teks