SpringerLink (Online service) & Haapala, I. (2012). From the earth's core to outer space. Springer Berlin Heidelberg.
Čikaški stil citiranja (17. izdanje)SpringerLink (Online service) i Ilmari Haapala. From the Earth's Core to Outer Space. Berlin, Heidelberg: Springer Berlin Heidelberg, 2012.
MLA način citiranja (8. izdanje)SpringerLink (Online service) i Ilmari Haapala. From the Earth's Core to Outer Space. Springer Berlin Heidelberg, 2012.
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