Orlicky, Joseph, author
McGraw-Hill, 1975
Buku Teks
Servan-Schreiber, David, author
Viking , 2008
Buku Teks
Servan-Schreiber, David, author
Viking , 2008
Buku Teks
Vollmann, Thomas E., author
Business One Irwin, 1993
Buku Referensi
Universit of Alexandria , 1992
Buku Teks