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Majalah, Jurnal, Buletin
Richards, Jack C., author
Cambridge University Press, 2005
Buku Teks
Esa Oktaviawati, author
Fakultas Psikologi Universitas Indonesia, 2015
UI - Skripsi (Membership)
Puput Mariyati, author
Fakultas Psikologi Universitas Indonesia, 2012
UI - Skripsi (Open)
ISEAS Publication, 2006
Buku Teks