Wright, Jeremy, author
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Buku Teks
Eades, Keith M., author
Andi, 2005
Buku Teks
Samuel D. Deep
Pustaka Binaman Pressindo , 1995
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Aquira K. Moeladi, author
Universitas Indonesia, 2005
UI - Tesis (Membership)
Kelley, Kitty, author
Gramedia Pustaka Utama, 2011
Buku Teks