Colley, B. C. (2005). Practical manual of land development. New York, NY: McGraw-Hill.
Dyfyniad Arddull ChicagoColley, Barbara C. Practical Manual of Land Development. New York, NY: McGraw-Hill, 2005.
Dyfyniad MLAColley, Barbara C. Practical Manual of Land Development. New York, NY: McGraw-Hill, 2005.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.