Gaya APA
Ellyard,David. (2001).
Encyclopedia of Discovery Earth .
:
Weldon Owen.
Gaya Chicago
Ellyard,David.
Encyclopedia of Discovery Earth.
:
Weldon Owen,
2001.
Reference.
Gaya MLA
Ellyard,David.
Encyclopedia of Discovery Earth.
:
Weldon Owen,
2001.
Reference.
Gaya Turabian
Ellyard,David.
Encyclopedia of Discovery Earth.
:
Weldon Owen,
2001.
Reference.