Friedlander, Walter A., author
Prentice Hall of India, 1982
Buku Teks
Australian council of social service, 0
Buku Teks
Timms, Rita, author
Routledge, 1982
Buku Referensi
Young, Pat, author
Macmillan, 1995
Buku Teks
Amalia Sevatita, author
Fakultas Ekonomi dan Bisnis Universitas Indonesia, 2019
UI - Skripsi (Membership)