National Academy of Engineering. Program Office & Helm, J. L. (1990). Energy: Production, consumption, and consequences. National Academy Press.
Chicago-čujuhus (17. p.)National Academy of Engineering. Program Office juo John L. Helm. Energy: Production, Consumption, and Consequences. Washington, D.C.: National Academy Press, 1990.
MLA-čujuhus (9. p.)National Academy of Engineering. Program Office juo John L. Helm. Energy: Production, Consumption, and Consequences. National Academy Press, 1990.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.