EICHER, D. L. (1973). Geologic Time Don L. Eicher. Prentice Hall International.
Chicagoスタイル(17版)引用形式EICHER, Don L. Geologic Time Don L. Eicher. Prentice Hall International, 1973.
MLA(8版)引用形式EICHER, Don L. Geologic Time Don L. Eicher. Prentice Hall International, 1973.
警告: この引用は必ずしも正確ではありません.