National Geographic Society (U.S.), McGraw-Hill Companies. McGraw-Hill School Division, & Banks, J. A. (2000). Regions: Adventure in time and place. McGraw-Hill.
Dyfyniad Arddull ChicagoNational Geographic Society (U.S.), McGraw-Hill Companies. McGraw-Hill School Division, and James A. Banks. Regions: Adventure in Time and Place. New York, N.Y.: McGraw-Hill, 2000.
Dyfyniad MLANational Geographic Society (U.S.), et al. Regions: Adventure in Time and Place. McGraw-Hill, 2000.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.