Duff, P. (1993). Holmes'principles of Physical Geology, 4th ed. Chapman &Hall.
シカゴスタイル引用形Duff, P.McL.D. Holmes'principles of Physical Geology, 4th Ed. London: Chapman &Hall, 1993.
MLA引用形式Duff, P.McL.D. Holmes'principles of Physical Geology, 4th Ed. Chapman &Hall, 1993.
警告: この引用は必ずしも正確ではありません.