Cita APA (7th ed.)

Villanueva, A. (1993). The ultraviolet sky. Anchor Books.

Cita Chicago (17th ed.)

Villanueva, Alma. The Ultraviolet Sky. New York: Anchor Books, 1993.

Cita MLA (9th ed.)

Villanueva, Alma. The Ultraviolet Sky. Anchor Books, 1993.