Rainer Adam [and others]
Frederich-Naumann-Stiftung, 2000
Buku Teks
Aaron, David, author
UNICEF, Yayasan Harapan Permata Hati Kita, Rotary Club, Ford Foundation, 2004
Buku Referensi
M. Amin Aziz, author
Bangkit, 1990
Buku Teks
Kumar, Somesh, author
Intermediate Technology, 2002
Buku Teks
Bambang Suryoatmono, author
Fakultas Teknik Universitas Katolik Parahyangan, 1997
Buku Referensi