APA (7th ed.) Citation

National Radio Astronomy Observatory (U.S.), Arecibo Ionospheric Observatory, & Terzian, Y. (1968). Interstellar ionized hydrogen. W. A. Benjamin.

Chicago Style (17th ed.) Citation

National Radio Astronomy Observatory (U.S.), Arecibo Ionospheric Observatory, and Yervant Terzian. Interstellar Ionized Hydrogen. New York: W. A. Benjamin, 1968.

MLA (8th ed.) Citation

National Radio Astronomy Observatory (U.S.), et al. Interstellar Ionized Hydrogen. W. A. Benjamin, 1968.