APA-referens (7:e uppl.)

Seeds, M. A. (1990). Foundations of astronomy (1990 edition.). Wadsworth Publishing Company.

Chicago-referens (17:e uppl.)

Seeds, Michael A. Foundations of Astronomy. 1990 edition. Belmont, California: Wadsworth Publishing Company, 1990.

MLA-referens (8:e uppl.)

Seeds, Michael A. Foundations of Astronomy. 1990 edition. Wadsworth Publishing Company, 1990.