Não informado. (1958). Stockholm contributions in geology. Stockholm University.
Chicago (17e ed.) BronvermeldingNão informado. Stockholm Contributions in Geology. Stockholm: Stockholm University, 1958.
MLA (8e ed.) BronvermeldingNão informado. Stockholm Contributions in Geology. Stockholm University, 1958.
Let op: Deze citaties zijn niet altijd 100% accuraat.