Djumadi
RajaGrafindo Persada, 1995
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New York Routledge 1997,
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Lidya Masyita Harnum
Fakultas Kesehatan Masyarakat Universitas Indonesia, 2019
UI - Skripsi Membership
Matindas, Rudolf Woodrow
Pustaka Utama Grafiti, [date of publication not identified]
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Hicks, Donald
Her Majesty's Stationary Office, 1976
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