Gaya APA
Engelman, Robert. (2009).
State of the world into a warming world 2009 (cetakan 1).
New York:
ww norton dan company.
Gaya Chicago
Engelman, Robert.
State of the world into a warming world 2009.
cetakan 1
New York:
ww norton dan company,
2009.
Text.
Gaya MLA
Engelman, Robert.
State of the world into a warming world 2009.
cetakan 1
New York:
ww norton dan company,
2009.
Text.
Gaya Turabian
Engelman, Robert.
State of the world into a warming world 2009.
cetakan 1
New York:
ww norton dan company,
2009.
Print.