Gaya APA
Keeton , William T. (1980).
Biological Science (Ed. 3).
New York:
W. W. Norton &Company.
Gaya Chicago
Keeton , William T.
Biological Science.
Ed. 3
New York:
W. W. Norton &Company,
1980.
Text.
Gaya MLA
Keeton , William T.
Biological Science.
Ed. 3
New York:
W. W. Norton &Company,
1980.
Text.
Gaya Turabian
Keeton , William T.
Biological Science.
Ed. 3
New York:
W. W. Norton &Company,
1980.
Print.