(2007). Organically produced foods (third edition.).
Chicago-čujuhus (17. p.)Organically Produced Foods. third edition. 2007.
MLA-čujuhus (9. p.)Organically Produced Foods. third edition. 2007.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.