Silverius Yoseph Soeharso
1989
UI - Skripsi Membership
Davido, Roseline D.
Salemba Humanika, 2016
Buku Teks
R.B. Suryama Majanasastra
Fakultas Psikologi Universitas Indonesia, 1989
UI - Skripsi Membership
Artikel Jurnal
American Psychological Association, 1985
Buku Teks