Helmi Kasim, author
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UI - Tesis (Membership)
Sophie Dhinda Aulia Brahmana, author
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UI - Tesis (Membership)
Harahap, M. Yahya, author
Sinar Grafika, 2004
Buku Teks
Harahap, M. Yahya, author
Pustaka Kartini, 1991
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Hudson, Manley O., author
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