Simbolon, Aladin Edivollo, author
Fakultas Psikologi Universitas Indonesia, 1989
UI - Skripsi (Membership)
Kaniasari, author
1997
UI - Skripsi (Membership)
Eko Aditiya Meinarno, author
Fakultas Psikologi Universitas Indonesia, 2001
UI - Skripsi (Membership)
Santayana, George, author
Dover, 1955
Buku Teks
James, William, author
Dover, 1956
Buku Teks