Gaya APA
Levy, Michael [et.al], Arroyo, Guido [et.al]. (2008).
Space Exploration .
Chicago:
Encyclopedia Britannica Inc.
Gaya Chicago
Levy, Michael [et.al], Arroyo, Guido [et.al].
Space Exploration.
Chicago:
Encyclopedia Britannica Inc,
2008.
Buku.
Gaya MLA
Levy, Michael [et.al], Arroyo, Guido [et.al].
Space Exploration.
Chicago:
Encyclopedia Britannica Inc,
2008.
Buku.
Gaya Turabian
Levy, Michael [et.al], Arroyo, Guido [et.al].
Space Exploration.
Chicago:
Encyclopedia Britannica Inc,
2008.
Buku.