Boatright, John R.
Pearson education International, 2009
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PĂ©rez Pulido, Margarita
Chandos Publishing, 2018
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Hosmer, LaRue T.
Prentice-Hall, 1982
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Kavaler, Florence
Jones & Bartlett Learning, 2014
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Agus Saepul Dahlan
Fakultas Kesehatan Masyarakat Universitas Indonesia, 2020
UI - Tesis Membership