Gaya APA

Yeo, D, J. et al (2019). New Syllabus Additional Mathematics 9th Edition: Workbook (9th Edition, 2019). Singapore: Shinglee Publishers PTE LTD.

Gaya MLA

Yeo, Dr, Joseph. et al. "New Syllabus Additional Mathematics 9th Edition: Workbook". 9th Edition, 2019 Singapore: Shinglee Publishers PTE LTD, 2019. Text.