editors, E.K.M. Masinambow & Paul Haenen
LIPI-RUL , 1994
Buku Teks
Rini Palupi Radikun, author
Fakultas Ekonomi dan Bisnis Universitas Indonesia, 1992
UI - Skripsi (Membership)
Petocz, Ronald G., author
Pustaka Grafiti Press, 1987
Buku Teks
Garnaut, Ross, author
Gramedia, 1979
Buku Teks
Teddy Kaleb Edward Wanane, author
Universitas Indonesia, 1997
UI - Tesis (Membership)