Gaya APA
Cuningham, William. (2013).
Environmental Science : A Global Concern , Ed 8 (8).
Amerika:
McGraw Hill.
Gaya Chicago
Cuningham, William.
Environmental Science : A Global Concern , Ed 8.
8
Amerika:
McGraw Hill,
2013.
Buku.
Gaya MLA
Cuningham, William.
Environmental Science : A Global Concern , Ed 8.
8
Amerika:
McGraw Hill,
2013.
Buku.
Gaya Turabian
Cuningham, William.
Environmental Science : A Global Concern , Ed 8.
8
Amerika:
McGraw Hill,
2013.
Buku.