APA (7th ed.) Citation

(1987). Exercises in astronomy (Rev. and extended ed.). Reidel.

Chicago Style (17th ed.) Citation

Exercises in Astronomy. Rev. and extended ed. Dordrecht [u.a.]: Reidel, 1987.

MLA (9th ed.) Citation

Exercises in Astronomy. Rev. and extended ed. Reidel, 1987.