APA-čujuhus (7. p.)

Environmental Evidence. BioMed Central.

Chicago-čujuhus (17. p.)

Environmental Evidence. BioMed Central.

MLA-čujuhus (9. p.)

Environmental Evidence. BioMed Central.

Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.