(1900). Delaware College Agricultural experiment station: научное издание.
Chicago-čujuhus (17. p.)Delaware College Agricultural Experiment Station: научное издание. 1900.
MLA-čujuhus (9. p.)Delaware College Agricultural Experiment Station: научное издание. 1900.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.