Gaya APA
Ritchie , Donald D.. (1979).
BIOLOGY .
Boston:
Addson-Wesley Publishing Company.
Gaya Chicago
Ritchie , Donald D..
BIOLOGY.
Boston:
Addson-Wesley Publishing Company,
1979.
Text.
Gaya MLA
Ritchie , Donald D..
BIOLOGY.
Boston:
Addson-Wesley Publishing Company,
1979.
Text.
Gaya Turabian
Ritchie , Donald D..
BIOLOGY.
Boston:
Addson-Wesley Publishing Company,
1979.
Print.