My World Of Science Light And Dark. Heinemann Library.
Chicago-čujuhus (17. p.)My World Of Science Light And Dark. Heinemann Library.
MLA-čujuhus (9. p.)My World Of Science Light And Dark. Heinemann Library.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.