Kumada, K. (1987). Chemistry of soil organic matter. Tokyo: Japan Scientific Societies Press.
シカゴスタイル引用形Kumada, Kyoichi. Chemistry of Soil Organic Matter. Tokyo: Japan Scientific Societies Press, 1987.
MLA引用形式Kumada, Kyoichi. Chemistry of Soil Organic Matter. Tokyo: Japan Scientific Societies Press, 1987.
警告: この引用は必ずしも正確ではありません.