Gaya APA
Enger, Eldon D. (2008).
Evironmental Science thirteenth edition (Thirteenth edition).
New York:
Mc Graw Hill.
Gaya Chicago
Enger, Eldon D.
Evironmental Science thirteenth edition.
Thirteenth edition
New York:
Mc Graw Hill,
2008.
ML.
Gaya MLA
Enger, Eldon D.
Evironmental Science thirteenth edition.
Thirteenth edition
New York:
Mc Graw Hill,
2008.
ML.
Gaya Turabian
Enger, Eldon D.
Evironmental Science thirteenth edition.
Thirteenth edition
New York:
Mc Graw Hill,
2008.
ML.