Sheahan, R. T. (1981). Alternative energy sources: A strategy planning guide. Aspen Systems Corp.
Chicagoスタイル(17版)引用形式Sheahan, Richard T. Alternative Energy Sources: A Strategy Planning Guide. Rockville, Md: Aspen Systems Corp, 1981.
MLA(9版)引用形式Sheahan, Richard T. Alternative Energy Sources: A Strategy Planning Guide. Aspen Systems Corp, 1981.
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