Campbell, John R., author
McGraw-Hill , 1969
Buku Teks
Ty-Casper, Linda
Giraffe Books, 1995
Buku Teks
Artikel Jurnal
Wright, Frank Lloyd, author
Architectural Record, 1975
Buku Teks
Mosher, Arthur T., author
Agricultural Development Council , 1969
Buku Teks