Ho Peg Leng. (2017). Science Activity Book 1. Marshall Cavendish.
Lua i Stíl Chicago (17ú heag.)Ho Peg Leng. Science Activity Book 1. Singapore: Marshall Cavendish, 2017.
Lua MLA (9ú heag.)Ho Peg Leng. Science Activity Book 1. Marshall Cavendish, 2017.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.