Foster, R. J. (1979). Physical geology. Charles E. Merrill.
Chicagoスタイル(17版)引用形式Foster, Robert J. Physical Geology. Columbus: Charles E. Merrill, 1979.
MLA(9版)引用形式Foster, Robert J. Physical Geology. Charles E. Merrill, 1979.
警告: この引用は必ずしも正確ではありません.