APA (7th ed.) Citation

Seeds, M., & Backman, D. (2012). Horizons: Exploring the universe. Cengage.

Chicago Style (17th ed.) Citation

Seeds, Michael, and Dana Backman. Horizons: Exploring the Universe. Cengage, 2012.

MLA (8th ed.) Citation

Seeds, Michael, and Dana Backman. Horizons: Exploring the Universe. Cengage, 2012.

Warning: These citations may not always be 100% accurate.