Myrdal, Gunnar, 1898-, author
Pantheon Books, 1963
Buku Teks
Universitas Indonesia, 1989
UI - Skripsi (Membership)
Lance, Peter.
Regan Books, 2004
Buku Teks
MacIver, Robert M., author
Alfred A. Knopf, 1952
Buku Teks
Busia,K.A
United States of America, 1962
Buku Teks