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Fakultas Ilmu Pengetahuan dan Budaya Universitas Indonesia, 2015
UI - Skripsi (Membership)
Gramedia, 1987
Buku Teks
Sumitro Joyohadikusumo
Institute for Economic and Social Research, Education, and Information, 1977
Buku Teks
The Insitute for Economic and Social Research, 1954
Buku Teks
Eramus University , 1995
Buku Teks