APA (7th ed.) Citation

(2008). Journey to the edge of the universe. Nat Geo.

Chicago Style (17th ed.) Citation

Journey to the Edge of the Universe. Vivendi, California: Nat Geo, 2008.

MLA (8th ed.) Citation

Journey to the Edge of the Universe. Nat Geo, 2008.

Warning: These citations may not always be 100% accurate.