Tracy Maria Putri Nauli, author
Fakultas Psikologi Universitas Indonesia, 2016
UI - Skripsi Membership
Nurnahdiyah, author
Fakultas Psikologi Universitas Indonesia, 2016
UI - Skripsi (Membership)
Berghe,Pirre Van Den
Basic Books Inc Publishers, 1970
Buku Teks
Pine, Gerald J.
Love Publishing Company, 1977
Buku Teks
Nabilah Aqila, author
2016
UI - Skripsi (Membership)