Kummel, B. (1961). History of the earth: :An introduction to historical geology. Eurasia.
シカゴスタイル引用形Kummel, Bernhard. History of the Earth: :An Introduction to Historical Geology. New Delhi: Eurasia, 1961.
MLA引用形式Kummel, Bernhard. History of the Earth: :An Introduction to Historical Geology. Eurasia, 1961.
警告: この引用は必ずしも正確ではありません.