Christophorus Bayu Dwiprana
Fakultas Ekonomi dan Bisnis Universitas Indonesia, 2020
UI - Makalah dan Kertas Kerja
Crisp, L.F. (Leslie Finlay)
Yale University Press, 1949
Buku Teks SO
Lumb, R.D.
Butterworth, 1974
Buku Teks
Australia Government Publishing Service , 1985
Buku Teks SO
The Korea Development Institute, 1998
Buku Teks