Mokodompit, Esther J.
Universitas Indonesia, 1995
UI - Skripsi (Membership)
Freedman, Ralph
Princeton University Press, 1963
Koleksi Publik
Edlina Hafmini Eddin
1985
UI - Skripsi (Membership)
Hewett, Dorothy
Victoria: Penguin Books, 1990
Buku Teks
Robinson, Rolland
Macmillan, 1973
Buku Teks