Gill, John
Paul Chapman Publishing, Inc, 1991
Buku Teks
Gill, John
Paul Chapman Publishing, 1991
Buku Teks
Gerstenfeld, Arthur
California Addison-Wesley Publishing , 1970
Buku Teks
Frank Cass & Co. Ltd.,
Majalah, Jurnal, Buletin
Retno Wulandari, author
Fakultas Ekonomi dan Bisnis Universitas Indonesia, 1993
UI - Skripsi Membership