Não informado. (1951). Annual Report of the International Tin Research Council. International Tin Research Institute.
Chicago (17e ed.) BronvermeldingNão informado. Annual Report of the International Tin Research Council. Greenford, Inglaterra: International Tin Research Institute, 1951.
MLA (8e ed.) BronvermeldingNão informado. Annual Report of the International Tin Research Council. International Tin Research Institute, 1951.
Let op: Deze citaties zijn niet altijd 100% accuraat.