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UI - Tesis Membership
Fakultas Psikologi Universitas Indonesia, 2001
UI - Skripsi Membership
Toynbee, Arnold J., author
Oxford University Press, 1956
Buku Teks
Gar, Joseph
Dodd, Mead, 1963
Buku Teks
Ewing, J.H., editor
Dell Publishing, 1964
Buku Teks