Potts, E. Daniel
Oxford University Press, 1985
Buku Teks
Edwards, Paul M., author
Paul M. Edwards, 2006
Buku Referensi
Hoffman, Frederick J.
The Free Press, 1962
Buku Teks
National Building Museum, 1995
Buku Teks
Millis, Walter
Mentor Book, 1956
Buku Teks