APA (7th ed.) Citation

Zadunaisky, P. E., & Miller, B. (1961). Elements of the orbit of the satellite 1959 ETA (Vanguard III) during the first year after launching. Smithsonian Astrophysical Observatory.

Chicago Style (17th ed.) Citation

Zadunaisky, P. E., and B. Miller. Elements of the Orbit of the Satellite 1959 ETA (Vanguard III) During the First Year After Launching. Cambridge, Mass.: Smithsonian Astrophysical Observatory, 1961.

MLA (9th ed.) Citation

Zadunaisky, P. E., and B. Miller. Elements of the Orbit of the Satellite 1959 ETA (Vanguard III) During the First Year After Launching. Smithsonian Astrophysical Observatory, 1961.