Não informado. (2020). Special Reports on the Mineral Resources of Great Britain. H. M. Stationery Office.
Chicago (17e ed.) BronvermeldingNão informado. Special Reports on the Mineral Resources of Great Britain. London: H. M. Stationery Office, 2020.
MLA (8e ed.) BronvermeldingNão informado. Special Reports on the Mineral Resources of Great Britain. H. M. Stationery Office, 2020.
Let op: Deze citaties zijn niet altijd 100% accuraat.