Gaya APA

KOPPES, S, N. (2004). Killer Rocks From Outer Space : Asteroids, Comets, And Meteorites . Minneapolis: Twenty-First Century Books.

Gaya MLA

KOPPES, Steven, N.. "Killer Rocks From Outer Space : Asteroids, Comets, And Meteorites". Minneapolis: Twenty-First Century Books, 2004. Text.