APA način citiranja

National Geographic Society. (2007). 1912-13, η μεγάλη εξόρμηση. Αθήνα: National Geographic.

Čikaški stil citiranja

National Geographic Society. 1912-13, η μεγάλη εξόρμηση. Αθήνα: National Geographic, 2007.

MLA način citiranja

National Geographic Society. 1912-13, η μεγάλη εξόρμηση. Αθήνα: National Geographic, 2007.

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