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Kotler, Philip, author
John Wiley & Sons, 2003
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Abdillah Hanafi, author
Usaha Nasional, 1981
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Kurniawan, author
Fakultas Kedokteran Gigi Universitas Indonesia, 2014
UI - Tesis (Membership)
Heru Nugroho, author
Pustaka Pelajar, 2000
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