Gaya APA

Yeo, D, J. et al (2016). New Syllabus Mathematics 4 7th Edition: Workbook (Revised Edition, 2016). Singapore: Shinglee Published PTE LTD.

Gaya MLA

Yeo, Dr, Joseph. et al. "New Syllabus Mathematics 4 7th Edition: Workbook". Revised Edition, 2016 Singapore: Shinglee Published PTE LTD, 2016. Text.