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Chicago-čujuhus (17. p.)ebrary, Inc, Walter Leal Filho, juo Julia Gottwald. Educational and Technological Approaches to Renewable Energy. Frankfurt am Main: Peter Lang, 2012.
MLA-čujuhus (9. p.)ebrary, Inc, et al. Educational and Technological Approaches to Renewable Energy. Peter Lang, 2012.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.