Gaya APA

Consolmagno, G., Davis, D, M. (2014). Turn left at orion : hundreds of night sky objects to see in home telescope - and how to find them (4th Ed.). Cambridge: Cambridge University Press.

Gaya MLA

Consolmagno, Guy., Davis, Dan, M.. "Turn left at orion : hundreds of night sky objects to see in home telescope - and how to find them". 4th Ed. Cambridge: Cambridge University Press, 2014. Text.