Ana Kolkowska. (2019). Cambridge IGCSE Spanish as a Foreign Language. Harper Collins.
Chicago-čujuhus (17. p.)Ana Kolkowska. Cambridge IGCSE Spanish as a Foreign Language. London: Harper Collins, 2019.
MLA-čujuhus (9. p.)Ana Kolkowska. Cambridge IGCSE Spanish as a Foreign Language. Harper Collins, 2019.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.