Titmuss, Richard M.
George Allen and Unwin, 1959
Buku Teks
Pakpahan, Muchtar, author
Organization Trusty Council of Confederation for Indonesian Prosperity Trade Union, 2010
Artikel Jurnal
Artikel Jurnal
Hafizh Mulia, author
Fakultas Ilmu Sosial dan Ilmu Politik Universitas Indonesia, 2019
UI - Tugas Akhir
Castles, Francis G.
Allen & Unwin, 1985
Buku Teks