Cita APA (7th ed.)

National Geographic. (2008). The science book: Everything you need to know about the world and how it works. National Geographic.

Cita Chicago (17th ed.)

National Geographic. The Science Book: Everything You Need to Know About the World and How It Works. Washington, D.C: National Geographic, 2008.

Cita MLA (9th ed.)

National Geographic. The Science Book: Everything You Need to Know About the World and How It Works. National Geographic, 2008.

Atenció: Aquestes cites poden no estar 100% correctes.