Ford, R. E. (1999). GeoSystems today: An interactive casebook. New York: John Wiley & Sons.
シカゴスタイル引用形Ford, Robert E. GeoSystems Today: An Interactive Casebook. New York: John Wiley & Sons, 1999.
MLA引用形式Ford, Robert E. GeoSystems Today: An Interactive Casebook. New York: John Wiley & Sons, 1999.
警告: この引用は必ずしも正確ではありません.