DUN. (2021). Cambridge Lower Secondary Maths Sta. Harper Collins Publisher.
Chicago-čujuhus (17. p.)DUN. Cambridge Lower Secondary Maths Sta. Ireland: Harper Collins Publisher, 2021.
MLA-čujuhus (9. p.)DUN. Cambridge Lower Secondary Maths Sta. Harper Collins Publisher, 2021.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.