Valkenburg, S. V. (1942). America at war: A geographical analysis. Prentice-Hall.
Chicagoスタイル(17版)引用形式Valkenburg, Samuel Van. America at War: A Geographical Analysis. New York: Prentice-Hall, 1942.
MLA(9版)引用形式Valkenburg, Samuel Van. America at War: A Geographical Analysis. Prentice-Hall, 1942.
警告: この引用は必ずしも正確ではありません.