Day, R. W. (2010). Foundation engineering handbook: Design and construction with the 2009 international building code (2nd ed.). Mc Graw-Hill Companies.
Dyfyniad Arddull ChicagoDay, Robert W. Foundation Engineering Handbook: Design and Construction with the 2009 International Building Code. 2nd ed. New York: Mc Graw-Hill Companies, 2010.
Dyfyniad MLADay, Robert W. Foundation Engineering Handbook: Design and Construction with the 2009 International Building Code. 2nd ed. Mc Graw-Hill Companies, 2010.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.