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Warner Books, 1997
Buku Teks
Rosenberg, Helena Hacker
Harper Collins , 1998
Buku Teks
De Mente, Boye, author
Tuttle Publishing, 2008
Buku Teks
Michael Widi Susanto, author
1997
UI - Skripsi (Membership)
Mira H. Suparto, author
1990
UI - Skripsi (Membership)