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2000
UI - Skripsi (Membership)
[publisher not identified], [date of publication not identified]
Naskah
M. Ifyani, author
Fakultas Ilmu Pengetahuan dan Budaya Universitas Indonesia, 1995
UI - Skripsi (Membership)
Soemitro Djojohadikusumo, author
LP3ES, 1994
Buku Teks
Tobing, Christina Ruth Elisabeth Lumbang, author; Junita Elvira Pandji Surya, author
Fakultas Psikologi Universitas Indonesia, 2004
UI - Tesis Membership