Merkoša sitáhtat

APA-čujuhus (7. p.)
Petkutė, R. (2012). English for sustainable environment: Study book. Technika.
Chicago-čujuhus (17. p.)
Petkutė, Rūta. English for Sustainable Environment: Study Book. Vilnius: Technika, 2012.
MLA-čujuhus (9. p.)
Petkutė, Rūta. English for Sustainable Environment: Study Book. Technika, 2012.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.