Gaya APA

Schaaf, F. (2008). The Brightest Stars ( Discovering the Universe Through the Sky's Briliant Stars) . Amerika Serikat: John Wiley & Sons, Inc..

Gaya MLA

Schaaf, Fred. "The Brightest Stars ( Discovering the Universe Through the Sky's Briliant Stars)". Amerika Serikat: John Wiley & Sons, Inc., 2008. Text.