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Buku Teks
Youngseon Jo, author
PT Elex Media Komputindo, 2013
Buku Teks
Ross, Alf, author
Harvard University Press, 1952
Buku Teks
Downie, Leonard, author
Vintage Books, 2002
Buku Teks
Bimo Bramantyo, author
Fakultas Psikologi Universitas Indonesia, 2014
UI - Skripsi (Membership)