Primalani, V., Leng, C. M., Quek, K., & Meng, S. K. (2003). In step maths: Workbook. SNP Panpac.
芝加哥风格引文Primalani, Varsha, Chan Mei Leng, Karen Quek, 与 Sin Kwai Meng. In Step Maths: Workbook. Singapore: SNP Panpac, 2003.
MLA引文Primalani, Varsha, et al. In Step Maths: Workbook. SNP Panpac, 2003.
警告：这些引文格式不一定是100％准确.