Harrison, I. (2004). The book of inventions: How'd they come up with that. National Geographic.
Chicago-Zitierstil (17. Ausg.)Harrison, Ian. The Book of Inventions: How'd They Come Up with That. Washington, D.C: National Geographic, 2004.
MLA-Zitierstil (9. Ausg.)Harrison, Ian. The Book of Inventions: How'd They Come Up with That. National Geographic, 2004.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.