Fuad al-Bahi, Al-Sayid
Dar al-Fikr al-'Arabi , 1956
Buku Teks
Artikel Jurnal
Riggio, Ronald E., author
Pearson, 2009
Buku Teks
William D. Crano, Radmila Prislin, editor
Psychology Press, 2008
Buku Teks
Fakultas Psikologi Universitas Indonesia,
Majalah, Jurnal, Buletin