Gaya APA
Koh, Caroline. (2007).
SCIENCE IN FOCUS BIOLOGY 'O' LEVEL .
Singapore:
pearson longman.
Gaya Chicago
Koh, Caroline.
SCIENCE IN FOCUS BIOLOGY 'O' LEVEL.
Singapore:
pearson longman,
2007.
Text.
Gaya MLA
Koh, Caroline.
SCIENCE IN FOCUS BIOLOGY 'O' LEVEL.
Singapore:
pearson longman,
2007.
Text.
Gaya Turabian
Koh, Caroline.
SCIENCE IN FOCUS BIOLOGY 'O' LEVEL.
Singapore:
pearson longman,
2007.
Print.