Gaya APA
Essentials of Biology. (2007).
Amerika:
[s.n.].
Gaya Chicago
Essentials of Biology.
1.
Amerika:
[s.n.],
2007.
Text.
Gaya MLA
Essentials of Biology.
1.
Amerika:
[s.n.],
2007.
Text.
Gaya Turabian
Essentials of Biology.
Amerika:
[s.n.],
2007.
Print.