Seeds, M., & Backman, D. (2012). Horizons: Exploring the universe. Cengage.
Chicago Style (17th ed.) CitationSeeds, Michael, and Dana Backman. Horizons: Exploring the Universe. Cengage, 2012.
MLA (8th ed.) CitationSeeds, Michael, and Dana Backman. Horizons: Exploring the Universe. Cengage, 2012.
Warning: These citations may not always be 100% accurate.