Halffter, G. (2005). TOWARDS A CULTURE OF BIODIVERSITY CONSERVATION. Instituto de Ecología, A.C.
Chicago-čujuhus (17. p.)Halffter, Gonzalo. TOWARDS A CULTURE OF BIODIVERSITY CONSERVATION. Instituto de Ecología, A.C, 2005.
MLA-čujuhus (9. p.)Halffter, Gonzalo. TOWARDS A CULTURE OF BIODIVERSITY CONSERVATION. Instituto de Ecología, A.C, 2005.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.
