Não informado. (1976). Dissertation abstracts international. University Microfilms International.
Chicagoスタイル(17版)引用形式Não informado. Dissertation Abstracts International. London: University Microfilms International, 1976.
MLA(8版)引用形式Não informado. Dissertation Abstracts International. University Microfilms International, 1976.
警告: この引用は必ずしも正確ではありません.