Janney, Jack R., author
American Society of Civil Engineers, 1979
Buku Referensi
edited by Edwin H. Gaylord, Jr., Charles N. Gaylord, James E. Stallmeyer.
McGraw-Hill, 1997
Buku Teks
edited by Richard N. White, Charles G. Salmon
John Wiley & Sons, 1987
Buku Referensi
edited by Edwin H. Gaylord, Jr., Charles N. Gaylord
McGraw-Hill, 1980
Buku Referensi
LePatner, Barry B., author
McGraw-Hill, 1982
Buku Teks