Gaya APA

, ., Koppes, S, N. (2004). Killer rocks from outer space: asteroids, comets, and meteorites . Minneapolis: Minneapolis: Twenty-First Century Books, 2004.

Gaya MLA

, ., Koppes, Steven, N. "Killer rocks from outer space: asteroids, comets, and meteorites". Minneapolis: Minneapolis: Twenty-First Century Books, 2004, 2004. .