Sanders, J. E. (1981). Principles of physical geology. John willey &sons.
シカゴスタイル引用形Sanders, John E. Principles of Physical Geology. New york: John willey &sons, 1981.
MLA引用形式Sanders, John E. Principles of Physical Geology. John willey &sons, 1981.
警告: この引用は必ずしも正確ではありません.