Freeland, Cynthia A., author
Oxford University Press, 2001
Buku Teks
Iriantine Karnaya, author
Fakultas Teknik Universitas Indonesia, 2011
UI - Tesis (Open)
Smith, Bernard, author
Oxford University Press, 1976
Buku Teks
Edwards, David, author
Sage Publication, 2004, 2004
Buku Teks
Raheb-Mol, Joanne., author
Oxford University Press, 1998
Buku Referensi