APA (7e ed.) Bronvermelding

Não informado. (1974). World mineral statistics. Institute of Geological Sciences.

Chicago (17e ed.) Bronvermelding

Não informado. World Mineral Statistics. London: Institute of Geological Sciences, 1974.

MLA (8e ed.) Bronvermelding

Não informado. World Mineral Statistics. Institute of Geological Sciences, 1974.

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