Cita APA (7a ed.)

Cooper, I., Kay, J., & Kepple, G. R. (2008). The night sky observer's guide (1st ed., 1st printing.). Willmann-Bell.

Cita Chicago Style (17a ed.)

Cooper, Ian, Jenni Kay, y George Robert Kepple. The Night Sky Observer's Guide. 1st ed., 1st printing. Richmond: Willmann-Bell, 2008.

Cita MLA (9a ed.)

Cooper, Ian, et al. The Night Sky Observer's Guide. 1st ed., 1st printing. Willmann-Bell, 2008.