Teh, K. S., & Looi, C. K. (1992). New syllabus mathematics workbook 1. Shing Lee Publishers.
Lua i Stíl Chicago (17ú heag.)Teh, Keng Seng, agus Chin Keong Looi. New Syllabus Mathematics Workbook 1. Singapore: Shing Lee Publishers, 1992.
Lua MLA (8ú heag.)Teh, Keng Seng, agus Chin Keong Looi. New Syllabus Mathematics Workbook 1. Shing Lee Publishers, 1992.
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