Gibbons, J. (2000). Generic downwards accumulations. Elsevier.
Chicago-čujuhus (17. p.)Gibbons, J. Generic Downwards Accumulations. Elsevier, 2000.
MLA-čujuhus (9. p.)Gibbons, J. Generic Downwards Accumulations. Elsevier, 2000.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.