Susan Grant. (2018). Cambridge IGCSE® and O Level Economics Coursebook (Cambridge International IGCSE) (2.). Cambridge University Press.
Chicago-čujuhus (17. p.)Susan Grant. Cambridge IGCSE® and O Level Economics Coursebook (Cambridge International IGCSE). 2. Cambridge University Press, 2018.
MLA-čujuhus (9. p.)Susan Grant. Cambridge IGCSE® and O Level Economics Coursebook (Cambridge International IGCSE). 2. Cambridge University Press, 2018.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.