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. .