Gaya APA

Schaaf, F. (2008). The brightest start: discovering the universe trought the sky's most brilliant stars . Norwood, New Jersey: John Wiley $ Sons.

Gaya MLA

Schaaf, Fred. "The brightest start: discovering the universe trought the sky's most brilliant stars". Norwood, New Jersey: John Wiley $ Sons, 2008. Textbook.