Winham, Gilbert R.
University of Toronto Press, 1992
Buku Teks
Cabanellas, Guillermo, author
VCH, 1991
Buku Teks
Beckett, Grace
Russell & Russell, 1972
Buku Teks
Asnawi Manaf [and others]
UN-HABITAT, 2008
Buku Teks
Kyle W. Bagwell, Petros C. Mavroidis, editor
Cambridge University Press, 2011
Buku Teks