Roughley, T.C., author
Angus and Robertson, 1971
Buku Teks
Roughley, T.C., author
Angus and Robertson, 1968
Buku Teks
Artikel Jurnal
Maulida Lestari, author
Fakultas Ekonomi dan Bisnis Universitas Indonesia, 2008
UI - Tesis (Open)
Gulland, J.A., author
John Wiley & Sons, 1983
Buku Teks