Burrows, William E., author
McGaw-Hill, 2003
Multimedia
Burrows, William E., author
MCGraw-Hill , 2003
Buku Teks
[Fakultas Ekonomi UI, Kuliyyah of Economics and Management Sciences International Islamic University Malaysia], 2009
Artikel Jurnal
Schneerer, William F., author
McGraw-Hill, 1967
Buku Teks
Unesco , 1978
Buku Teks