APA (7th ed.) Citation

Ahmad, A., Salim, S., & Zainuddin, R. (2008). A cognitive tool to support mathematical communication in fraction word problem solving.

Chicago Style (17th ed.) Citation

Ahmad, A., S.S Salim, and R. Zainuddin. A Cognitive Tool to Support Mathematical Communication in Fraction Word Problem Solving. 2008.

MLA (9th ed.) Citation

Ahmad, A., et al. A Cognitive Tool to Support Mathematical Communication in Fraction Word Problem Solving. 2008.