Não informado. (1973). Information brochure. Fuel Research Institute of South Africa.
Chicagoスタイル(17版)引用形式Não informado. Information Brochure. Pretoria, Africa do Sul: Fuel Research Institute of South Africa, 1973.
MLA(8版)引用形式Não informado. Information Brochure. Fuel Research Institute of South Africa, 1973.
警告: この引用は必ずしも正確ではありません.