Hefferan, K., & O'Brien, J. (2010). Earth materials. Wiley-Blackwell.
Chicagoスタイル(17版)引用形式Hefferan, Kevin, , John O'Brien. Earth Materials. Chichester, West Sussex, Eng: Wiley-Blackwell, 2010.
MLA(9版)引用形式Hefferan, Kevin, , John O'Brien. Earth Materials. Wiley-Blackwell, 2010.
警告: この引用は必ずしも正確ではありません.