APA Citation

Porter, J. G., & Moore, P. Yearbook of astronomy. New York: W. W. Norton.

Chicago Style Citation

Porter, John Guy., and Patrick Moore. Yearbook of Astronomy. New York: W. W. Norton.

MLA Citation

Porter, John Guy., and Patrick Moore. Yearbook of Astronomy. New York: W. W. Norton.

Warning: These citations may not always be 100% accurate.