Sitompul, Marida Christina, author
Universitas Indonesia, 1982
UI - Skripsi Membership
Universitas Indonesia, 1991
UI - Skripsi Membership
Universitas Indonesia, 1989
UI - Skripsi Membership
Edwin Taufick, author
Universitas Indonesia, 1989
UI - Skripsi Membership
Ebenstein, William, author
Erlangga, 1987
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