APA (7th ed.) Citation

HUDSON, H. S., PETERSON, L. E., & SCHWARTZ, D. A. (1971). Observations of Unresolved Galactic X-ray Sources. Nature Publishing Group.

Chicago Style (17th ed.) Citation

HUDSON, H. S., L. E. PETERSON, and D. A. SCHWARTZ. Observations of Unresolved Galactic X-ray Sources. [s.l.]: Nature Publishing Group, 1971.

MLA (9th ed.) Citation

HUDSON, H. S., et al. Observations of Unresolved Galactic X-ray Sources. Nature Publishing Group, 1971.