Susan Grant. (2018). Cambridge IGCSE® and O Level Economics Coursebook (Cambridge International IGCSE) (2.). Cambridge University Press.
Čikaški stil citiranja (17. izdanje)Susan Grant. Cambridge IGCSE® and O Level Economics Coursebook (Cambridge International IGCSE). 2. Cambridge University Press, 2018.
MLA način citiranja (9. izdanje)Susan Grant. Cambridge IGCSE® and O Level Economics Coursebook (Cambridge International IGCSE). 2. Cambridge University Press, 2018.
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