Gaya APA
N.Koppes, S. (2004).
Killer Rocks from Outer Space : Asteroids,Comets, Meteorites .
Minneapollis:
Learner Publishing.
Gaya MLA
N.Koppes, Steven.
"Killer Rocks from Outer Space : Asteroids,Comets, Meteorites".
Minneapollis:
Learner Publishing,
2004.
Text.