Ashby, M. Introduction to Plant ecology.
Chicago-čujuhus (17. p.)Ashby, Maurice. Introduction to Plant Ecology.
MLA-čujuhus (9. p.)Ashby, Maurice. Introduction to Plant Ecology.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.