Kardelj, Edvard, author
Tarawang Press, 2001
Buku Teks
Sweezy, Paul M. (Paul Marlor), 1910-2004, author
McGraw-Hill, 1949
Buku Teks
Cole, G.D.H. (George Douglas Howard), 1889-1959, author
Victor Gollancz, 1950
Buku Teks
Gray, Alexander, author
Longmans, Green, 1948
Buku Teks
Seny Lewi, author
Universitas Indonesia, 2009
UI - Skripsi (Open)