(1972). New trends in chemistry teaching. Unesco.
Chicago-čujuhus (17. p.)New Trends in Chemistry Teaching. Peris: Unesco, 1972.
MLA-čujuhus (9. p.)New Trends in Chemistry Teaching. Unesco, 1972.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.