National Association of Social of social Workers, 1980
Buku Teks
National Association of Social of social Workers, 1980
Buku Teks
International Engineering Consortium
International Engineering Consortium, 2000
eBooks
Donny Pratomo
Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Indonesia, 2007
UI - Skripsi Membership
Springer, 2012
eBooks