Sturkell, E. (1998). The origin of the marine Lockne impact structure, Jämtland. Dept. of Geology and Geochemistry, Stockholm University.
Čikaški stil citiranja (17. izdanje)Sturkell, Erik. The Origin of the Marine Lockne Impact Structure, Jämtland. Stockholm, Sweden: Dept. of Geology and Geochemistry, Stockholm University, 1998.
MLA način citiranja (8. izdanje)Sturkell, Erik. The Origin of the Marine Lockne Impact Structure, Jämtland. Dept. of Geology and Geochemistry, Stockholm University, 1998.
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