Gaya APA

Hoyle, ., Hoyle, F. (2010). E-book Astronomy: A history of Man's Investigation of the Universe . New York: Doubleday & Company, Inc..

Gaya MLA

Hoyle, ., Hoyle, Fred. "E-book Astronomy: A history of Man's Investigation of the Universe". New York: Doubleday & Company, Inc., 2010. Text.