Downs, Frederick
W.W. Norton & Company, 1991
Buku Teks
Jackson, John Brinckerhoff, 1909-, author
Norton, 1972
Buku Teks
Logan, William Stewart
University of Washington Press, 2000
Buku Teks
Marryat, Frederick
Alfred A. Knopf, 1962
Buku Teks
Rudolph, Frederick
Knopf , 1962
Buku Teks