APA (7e ed.) Bronvermelding

Não informado. Statistical and other data on minerals: Quarterly information circular. Republic of South Africa, Department of Mines.

Chicago (17e ed.) Bronvermelding

Não informado. Statistical and Other Data on Minerals: Quarterly Information Circular. Pretoria, Africa do Sul: Republic of South Africa, Department of Mines.

MLA (8e ed.) Bronvermelding

Não informado. Statistical and Other Data on Minerals: Quarterly Information Circular. Republic of South Africa, Department of Mines.

Let op: Deze citaties zijn niet altijd 100% accuraat.