Gaya APA
Nachbar, S, F. (1998).
Encyclopedia of science 3 : the earth our planet-its land, sea, and air .
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Macmillan Library Reference.
Gaya MLA
Nachbar, Sondra, F..
"Encyclopedia of science 3 : the earth our planet-its land, sea, and air".
:
Macmillan Library Reference,
1998.
Reference.