Laumer, K. (1970). Nine by Laumer (1st Sphere Books ed.). Sphere Books.
Čikaški stil citiranja (17. izdanje)Laumer, Keith. Nine by Laumer. 1st Sphere Books ed. London: Sphere Books, 1970.
MLA način citiranja (8. izdanje)Laumer, Keith. Nine by Laumer. 1st Sphere Books ed. Sphere Books, 1970.
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