Davis, K. C. (2001). Don't know much about The universe: Everything you need to know about the cosmos but never learned. New York: Random House, Inc.
Dyfyniad Arddull ChicagoDavis, Kenneth C. Don't Know Much About The Universe: Everything You Need to Know About the Cosmos but Never Learned. New York: Random House, Inc, 2001.
Dyfyniad MLADavis, Kenneth C. Don't Know Much About The Universe: Everything You Need to Know About the Cosmos but Never Learned. New York: Random House, Inc, 2001.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.