Ho Peck Leng. (2017). Cambridge Primary Science Pupil's Book 4. Marshall Cavendish.
Chicago-čujuhus (17. p.)Ho Peck Leng. Cambridge Primary Science Pupil's Book 4. Singapore: Marshall Cavendish, 2017.
MLA-čujuhus (9. p.)Ho Peck Leng. Cambridge Primary Science Pupil's Book 4. Marshall Cavendish, 2017.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.