George, Nina, author
Gramedia Pustaka Utama, 2013
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Lencioni, Patrick, author
Salemba Empat, 2005
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Mira W., author
Gramedia Pustaka Utama, 1999
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Roby Aji, author
2018
UI - Tesis (Membership)
Zis Eno, author
Alinea, 2005
Buku Teks