Introduction to astronomy.

APA Citation

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

MLA Citation

Gaposchkin, Cecilia Helena Payne, 1900-. Introduction to Astronomy. New York: Prentice-Hall, 1954.

Warning: These citations may not always be complete (especially for serials).