APA (7th ed.) Citation

Marx, S., Pfau, W., & Mitton, S. (1982). Observatories of the world. Van Nostrand Reinhold.

Chicago Style (17th ed.) Citation

Marx, Siegfried, Werner Pfau, and Simon Mitton. Observatories of the World. New York: Van Nostrand Reinhold, 1982.

MLA (9th ed.) Citation

Marx, Siegfried, et al. Observatories of the World. Van Nostrand Reinhold, 1982.