Não informado. (2004). SA mining: South African mining, coal, gold, and base minerals. Johnnic Publishing.
Chicagoスタイル(17版)引用形式Não informado. SA Mining: South African Mining, Coal, Gold, and Base Minerals. Pinegowrie, Africa do Sul: Johnnic Publishing, 2004.
MLA(8版)引用形式Não informado. SA Mining: South African Mining, Coal, Gold, and Base Minerals. Johnnic Publishing, 2004.
警告: この引用は必ずしも正確ではありません.