APA (7th ed.) Citation

Christine, K., & Ainon Omar. (2007). English PMR. PNI Neuron (M) Sdn. Bhd.

Chicago Style (17th ed.) Citation

Christine, Khoo, and Ainon Omar. English PMR. Selangor: PNI Neuron (M) Sdn. Bhd, 2007.

MLA (9th ed.) Citation

Christine, Khoo, and Ainon Omar. English PMR. PNI Neuron (M) Sdn. Bhd, 2007.