edited by Amos Rapoport
Angus and Robertson , 1972
Buku Teks
McHarg, Ian L.
J. Wiley, 1992
Buku Teks
Watt, Kenneth E.F., 1929-
Allyn and Bacon, 1982
Buku Teks
editor, Leandro A. Viloria
University of the Philippines, 1984
Buku Teks
O`Neill, John, author
Routledge, 1993
Buku Teks