APA-čujuhus (7. p.)
Energy Sources, Part A: Recovery, Utilization, and Environmental Effects.
Chicago-čujuhus (17. p.)
Energy Sources, Part A: Recovery, Utilization, and Environmental Effects.
MLA-čujuhus (9. p.)
Energy Sources, Part A: Recovery, Utilization, and Environmental Effects.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.