Não informado. (1976). Erda energy research abstracts. Energy Research and Development Administration.
Chicagoスタイル(17版)引用形式Não informado. Erda Energy Research Abstracts. Washington: Energy Research and Development Administration, 1976.
MLA(8版)引用形式Não informado. Erda Energy Research Abstracts. Energy Research and Development Administration, 1976.
警告: この引用は必ずしも正確ではありません.