Perthel, Dirk, author
Amsterdam University, 1981
Buku Teks
Nor Edi Azhar Binti Mohamad, author
Universiti Tenaga Nasional, Malaysia, 2014
Artikel Jurnal
Bank Bumi Daya
[publisher not identified], 1980
Buku Teks
Fariz Rahmanto, author
Fakultas Ekonomi dan Bisnis Universitas Indonesia, 2016
Artikel Jurnal
Sritua Arief, author
Universitas Muhammadiyah Surakarta, 2002
Buku Teks