Hettner, A. (1972). Surface features of the land: Problems and methods of geomorphology. Macmillan.
シカゴスタイル引用形Hettner, Alfred. Surface Features of the Land: Problems and Methods of Geomorphology. London: Macmillan, 1972.
MLA引用形式Hettner, Alfred. Surface Features of the Land: Problems and Methods of Geomorphology. Macmillan, 1972.
警告: この引用は必ずしも正確ではありません.