Flo. Academic Press , 1980
Buku Teks
Iskhaq Zulkarnain, author
2018
UI - Skripsi (Membership)
Ploss, Sidney I
Princenton University Press, 1965
Buku Teks
Boulder Westview Press , 1988
Buku Teks
Hikmah Septia Rosa, author
Fakultas Psikologi Universitas Indonesia, 2015
UI - Skripsi (Membership)