APA (7th ed.) Citation

Grego, P. (2016). Moon observer's guide (Second edition.). Firefly Books.

Chicago Style (17th ed.) Citation

Grego, Peter. Moon Observer's Guide. Second edition. Richmond Hill, Ontario: Firefly Books, 2016.

MLA (9th ed.) Citation

Grego, Peter. Moon Observer's Guide. Second edition. Firefly Books, 2016.