Gaya APA
al, O, T, E. (2004).
Enhacing Thinking through Problem-based Learning Approaches (Cet. 5).
Singapore:
Thomson.
Gaya MLA
al, Oon-Seng, Tan, Et.
"Enhacing Thinking through Problem-based Learning Approaches".
Cet. 5
Singapore:
Thomson,
2004.
Text.