Não informado. (1961). API Abstracts of Refining Patents. American Petroleum Institute.
Chicagoスタイル(17版)引用形式Não informado. API Abstracts of Refining Patents. New York: American Petroleum Institute, 1961.
MLA(8版)引用形式Não informado. API Abstracts of Refining Patents. American Petroleum Institute, 1961.
警告: この引用は必ずしも正確ではありません.