Roberts, W. L., & George, R. R. W. (1974). Encyclopaedia of minerals. Van Nostrand Reinhold Company.
シカゴスタイル引用形Roberts, Willard Lincoln, , Robert Rapp Weber George. Encyclopaedia of Minerals. New York: Van Nostrand Reinhold Company, 1974.
MLA引用形式Roberts, Willard Lincoln, , Robert Rapp Weber George. Encyclopaedia of Minerals. Van Nostrand Reinhold Company, 1974.
警告: この引用は必ずしも正確ではありません.