APA (7e ed.) Bronvermelding

Não informado. (2021). Cooperative Resources Report. State Geological Survey.

Chicago (17e ed.) Bronvermelding

Não informado. Cooperative Resources Report. Urbana, Ill: State Geological Survey, 2021.

MLA (8e ed.) Bronvermelding

Não informado. Cooperative Resources Report. State Geological Survey, 2021.

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