APA (7e ed.) Bronvermelding

Não informado. (1999). Missouri bureau of geology and mines. Tribune Printing.

Chicago (17e ed.) Bronvermelding

Não informado. Missouri Bureau of Geology and Mines. Jefferson City, Mo: Tribune Printing, 1999.

MLA (8e ed.) Bronvermelding

Não informado. Missouri Bureau of Geology and Mines. Tribune Printing, 1999.

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