Cita APA (7a ed.)

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

Cita Chicago Style (17a ed.)

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

Cita MLA (8a ed.)

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