Christensen, B. (1961). Studies on cyto-taxonomy and reproduction in the Enchytraeidae: With notes on parthenogenesis and polyploidy in the animal kingdom. Berlingska Boktryckeriet.
Čikaški stil citiranja (17. izdanje)Christensen, Bent. Studies on Cyto-taxonomy and Reproduction in the Enchytraeidae: With Notes on Parthenogenesis and Polyploidy in the Animal Kingdom. Lund: Berlingska Boktryckeriet, 1961.
MLA način citiranja (8. izdanje)Christensen, Bent. Studies on Cyto-taxonomy and Reproduction in the Enchytraeidae: With Notes on Parthenogenesis and Polyploidy in the Animal Kingdom. Berlingska Boktryckeriet, 1961.
Upozorenje: Ovi citati možda nisu uvijek 100% točni.