Backler, A. L., & Lazarus, S. (1986). World geography. McDougal, Littell.
Chicagoスタイル(17版)引用形式Backler, Alan L., , Stuart Lazarus. World Geography. Evanston: McDougal, Littell, 1986.
MLA(8版)引用形式Backler, Alan L., , Stuart Lazarus. World Geography. McDougal, Littell, 1986.
警告: この引用は必ずしも正確ではありません.