Hadari Nawawi, author
Gadjah Mada University Press, 2011
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Boy Subirosa Sabarguna, author
UI Publishing, 2019
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Faisal Marzuki, author
Rajawali Press, 2022
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Prajwalita Cinantya, author
Fakultas Ekonomi dan BIsnis Universitas Indonesia, 2021
UI - Tesis (Membership)
Siagian, Sondang P., author
Bumi Aksara, 1993
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