HARWOOD, R. (2014). Cambridge IGCSE: Chemistry coursebook. Cambridge University Press.
Chicago-čujuhus (17. p.)HARWOOD, Richard. Cambridge IGCSE: Chemistry Coursebook. Cambridge University Press, 2014.
MLA-čujuhus (9. p.)HARWOOD, Richard. Cambridge IGCSE: Chemistry Coursebook. Cambridge University Press, 2014.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.