APA (7th ed.) Zitazioa

Seeds, M. A. (1986). Foundations of astronomy. Wadsworth.

Chicago Style (17th ed.) Zitazioa

Seeds, Michael A. Foundations of Astronomy. Belmont, Calif: Wadsworth, 1986.

MLA (9th ed.) Zitazioa

Seeds, Michael A. Foundations of Astronomy. Wadsworth, 1986.