Gaya APA
bradfield, phil. (2006).
AS LEVEL BIOLOGY .
London:
Longman.
Gaya Chicago
bradfield, phil.
AS LEVEL BIOLOGY.
London:
Longman,
2006.
Text.
Gaya MLA
bradfield, phil.
AS LEVEL BIOLOGY.
London:
Longman,
2006.
Text.
Gaya Turabian
bradfield, phil.
AS LEVEL BIOLOGY.
London:
Longman,
2006.
Print.