Westin, Alan F., author
The New York Times Book , 1973
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Artikel Jurnal
edited by Alistair Tough, Michael Moss
Chandos Publishing, 2006
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Diding Sarifudin, author
Fakultas Kesehatan Masyarakat Universitas Indonesia, 2007
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Karmila Hippy, author
Universitas Indonesia, 2015
UI - Tesis Membership