Gaya APA
Toh, C., Cheong, T. (2001).
Study Guide For You: A Level Chemistry Edition 2.0 .
Singapore:
Step-by-Step Puublications.
Gaya MLA
Toh, CS.., Cheong, Thomas.
"Study Guide For You: A Level Chemistry Edition 2.0".
Singapore:
Step-by-Step Puublications,
2001.
Text.