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).