Gaya APA
Koppes, S, N.
(2004).
Killer Rocks Outer Space : Asteroids, Comets, and ,Meteorites
.
USA :
TF-CB.
Gaya MLA
Koppes, Steven, N..
"Killer Rocks Outer Space : Asteroids, Comets, and ,Meteorites".
USA :
TF-CB,
2004.
Buku.