Wilson, Dick, author
Asian Development Bank , 1987
Buku Teks
White, John, author
Praeger , 1972
Buku Teks
Williams, Sara
Penguin , 1993
Buku Teks
Universitas Indonesia, 1996
UI - Skripsi (Membership)
Prasetyo Seno Pambudi, author
Fakultas Ekonomi dan Bisnis Universitas Indonesia, 2022
UI - Skripsi (Membership)