Forchheimer, S. (1972). Scanning electron microscope studies of Cretaceous coccoliths from the Köpingsberg Borehole No. 1, SE Sweden. [Sveriges geologiska undersökning].
Chicago Style aipamenaForchheimer, Sylvia. Scanning Electron Microscope Studies of Cretaceous Coccoliths from the Köpingsberg Borehole No. 1, SE Sweden. Stockholm: [Sveriges geologiska undersökning], 1972.
MLA aipamenaForchheimer, Sylvia. Scanning Electron Microscope Studies of Cretaceous Coccoliths from the Köpingsberg Borehole No. 1, SE Sweden. [Sveriges geologiska undersökning], 1972.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.