Não informado. (1964). Coal, gold and base minerals of Southern Africa. Pithead Press.
Chicagoスタイル(17版)引用形式Não informado. Coal, Gold and Base Minerals of Southern Africa. Johannesburg, Africa do Sul: Pithead Press, 1964.
MLA(8版)引用形式Não informado. Coal, Gold and Base Minerals of Southern Africa. Pithead Press, 1964.
警告: この引用は必ずしも正確ではありません.