Hough, B. O. (1920). Ocean traffic and trade. Lasalle Extension University.
Chicagoスタイル(17版)引用形式Hough, Benjamin Olney. Ocean Traffic and Trade. Chicago: Lasalle Extension University, 1920.
MLA(8版)引用形式Hough, Benjamin Olney. Ocean Traffic and Trade. Lasalle Extension University, 1920.
警告: この引用は必ずしも正確ではありません.