Gaya APA
Toon, T, Y. (2013).
Chemistry Matters — GCE O Level (2nd Edition) (2).
Singapore:
Marshall Cavendish Education.
Gaya MLA
Toon, Tan, Yin.
"Chemistry Matters — GCE O Level (2nd Edition)".
2
Singapore:
Marshall Cavendish Education,
2013.
Print.