Gaya APA
Brian Ratcliff, Helen Eccles dkk. (2004).
AS and A Level Chemistry .
British:
Cambride.
Gaya Chicago
Brian Ratcliff, Helen Eccles dkk.
AS and A Level Chemistry.
British:
Cambride,
2004.
Text.
Gaya MLA
Brian Ratcliff, Helen Eccles dkk.
AS and A Level Chemistry.
British:
Cambride,
2004.
Text.
Gaya Turabian
Brian Ratcliff, Helen Eccles dkk.
AS and A Level Chemistry.
British:
Cambride,
2004.
Print.