Ananda Zhafira, author
Fakultas Psikologi Universitas Indonesia, 2021
UI - Tugas Akhir
Daugherty, William E., author
Arno Press, 1958
Buku Teks
Dubois, Philip H., author
Harper & Rpw, 1965
Buku Teks
Aiken, Lewis R., author
Allyn and Bacon, 1997
Buku Teks
Siregar, Dewi Ashuro Itouli, author
Fakultas Psikologi Universitas Indonesia, 2012
UI - Tesis (Open)