Fakultas Psikologi Universitas Indonesia, 1999
UI - Skripsi (Membership)
Dalimunthe, Tapi Juliana, author
2002
UI - Skripsi (Membership)
Lips, Hilary M., author
McGraw-Hill, 2008
Buku Teks
Sembiring Pandia, Weny Savitri, author
1997
UI - Skripsi (Membership)
Archer, John, author
Cambridge University Press, 2002
Buku Teks