APA (7th ed.) Citation

Kirby-Smith, H. T. (1976). U.S. observatories: A directory and travel guide. Van Nostrand Reinhold.

Chicago Style (17th ed.) Citation

Kirby-Smith, H. T. U.S. Observatories: A Directory and Travel Guide. New York: Van Nostrand Reinhold, 1976.

MLA (8th ed.) Citation

Kirby-Smith, H. T. U.S. Observatories: A Directory and Travel Guide. Van Nostrand Reinhold, 1976.