APA (7th ed.) Citation

Seeds, M. A. (1991). Horizons: Exploring the universe (1991 ed.). Wadsworth.

Chicago Style (17th ed.) Citation

Seeds, Michael A. Horizons: Exploring the Universe. 1991 ed. Belmont, Calif: Wadsworth, 1991.

MLA (9th ed.) Citation

Seeds, Michael A. Horizons: Exploring the Universe. 1991 ed. Wadsworth, 1991.