Sesilia Adiska Niramaya, author
Fakultas Psikologi Universitas Indonesia, 2017
UI - Skripsi (Membership)
Posener, Julius, author
MIT Pres, 1992
Buku Teks
Makarenko, A.S., author
Progress, 1973
Buku Teks
Kappler, Karolin Eva
VS Verlag, 2012
eBooks
Maureen Ryan
Sense, 2012
eBooks