Steel, D. (2000). Target earth: How rogue asteroids and doomsday comets threaten our planet. Quarto Publishing.
Chicago Style (17th ed.) CitationSteel, Duncan. Target Earth: How Rogue Asteroids and Doomsday Comets Threaten Our Planet. London: Quarto Publishing, 2000.
MLA (9th ed.) CitationSteel, Duncan. Target Earth: How Rogue Asteroids and Doomsday Comets Threaten Our Planet. Quarto Publishing, 2000.
Warning: These citations may not always be 100% accurate.