Pui Yee. New Syllabus Primary Mathematics 1A: Workbook. Shinglee Publishers.
Lua i Stíl Chicago (17ú heag.)Pui Yee. New Syllabus Primary Mathematics 1A: Workbook. Shinglee Publishers.
Lua MLA (9ú heag.)Pui Yee. New Syllabus Primary Mathematics 1A: Workbook. Shinglee Publishers.
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