Gabriel, Tom
Belhaven Press , 1991
Buku Teks
Oakley, Peter, author
International Labour Office, 1991
Buku Teks
Chambers, Robert, 1932-, author
Longman, 1983
Buku Teks
Nakinda Novrasagelin, author
Fakultas Ilmu Sosial dan Ilmu Politik Universitas Indonesia, 2012
UI - Skripsi (Open)
Malassis, Louis, author
Gunung Agung, 1981
Buku Teks