APA

Gaposchkin C. H. P., . (1954). Introduction to astronomy. New York: Prentice-Hall.

Chicago

Gaposchkin Cecilia Helena Payne, . 1954. Introduction to astronomy. New York: Prentice-Hall.

Harvard

Gaposchkin C. H. P., . (1954). Introduction to astronomy. New York: Prentice-Hall.

MLA

Gaposchkin Cecilia Helena Payne, . Introduction to astronomy. New York: Prentice-Hall. 1954.