APA (7th ed.) Citation

Weigert, A., & Zimmermann, H. (1976). Concise encyclopedia of astronomy (2d English ed.). A. Hilger.

Chicago Style (17th ed.) Citation

Weigert, A., and Helmut Zimmermann. Concise Encyclopedia of Astronomy. 2d English ed. London: A. Hilger, 1976.

MLA (9th ed.) Citation

Weigert, A., and Helmut Zimmermann. Concise Encyclopedia of Astronomy. 2d English ed. A. Hilger, 1976.