Foong. New Syllabus Primary Mathematics 4B: COURSEBOOK. Shinglee Publishers.
芝加哥风格引文Foong. New Syllabus Primary Mathematics 4B: COURSEBOOK. Shinglee Publishers.
MLA引文Foong. New Syllabus Primary Mathematics 4B: COURSEBOOK. Shinglee Publishers.
警告：这些引文格式不一定是100％准确.