Παραπομπή σε μορφή APA (7η εκδ.)

Pugh, P. (2012). Observing the Messier Objects with a Small Telescope: In the Footsteps of a Great Observer. Springer New York.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Pugh, Philip. Observing the Messier Objects with a Small Telescope: In the Footsteps of a Great Observer. New York, NY: Springer New York, 2012.

Παραπομπή σε μορφή MLA (8th εκδ.)

Pugh, Philip. Observing the Messier Objects with a Small Telescope: In the Footsteps of a Great Observer. Springer New York, 2012.