Cita APA (7th ed.)

Gaposchkin, C. (1954). Introduction to astronomy. Prentice-Hall.

Cita Chicago (17th ed.)

Gaposchkin, Cecilia. Introduction to Astronomy. New Jersey: Prentice-Hall, 1954.

Cita MLA (9th ed.)

Gaposchkin, Cecilia. Introduction to Astronomy. Prentice-Hall, 1954.