APA (7th ed.) Citation

Marx, S., & Pfau, W. (1982). Observatories of the world. Blandford.

Chicago Style (17th ed.) Citation

Marx, Siegfried, and Werner Pfau. Observatories of the World. Poole: Blandford, 1982.

MLA (8th ed.) Citation

Marx, Siegfried, and Werner Pfau. Observatories of the World. Blandford, 1982.