Guthrie, Pat
McGraw-Hill, 2010
Buku Referensi
Allen, Edward
John Wiley & Sons, 2012
Buku Teks SO
Fawceff, A Peter
Architectural Press, 2003
Buku Teks SO
edited by Richard N. White, Charles G. Salmon
John Wiley & Sons, 1987
Buku Referensi
edited by Douglas C. Greenwood
McGraw-Hill, 1964
Buku Teks