Northrop, F. S. C., author
Macmillan, 1954
Buku Teks
Ria Widati, author
1986
UI - Skripsi (Membership)
Catharine Chelsea Patricia, author
Fakultas Ilmu Sosial dan Ilmu Politik Universitas Indonesia, 2017
UI - Tugas Akhir
Rosmerry, author
1986
UI - Skripsi (Membership)
Haviland, H. Field, author
The Brooking Institution, 1960
Buku Teks