Woodson, R. D. (1996). Builder's guide to wells and septics. New York: McGraw-Hill.
Dyfyniad Arddull ChicagoWoodson, R. Dodge. Builder's Guide to Wells and Septics. New York: McGraw-Hill, 1996.
Dyfyniad MLAWoodson, R. Dodge. Builder's Guide to Wells and Septics. New York: McGraw-Hill, 1996.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.