Gaya APA

et.al, K, S, H. (2021). My Pals Are Here! Science International Edition Activity Book 5A (Jil. 5). Singapore: Marshall Cavendish Education.

Gaya MLA

et.al, Kwa, Siew, Hwa,. "My Pals Are Here! Science International Edition Activity Book 5A". Jil. 5 Singapore: Marshall Cavendish Education, 2021. Text.