Dyfyniad APA

Pimentel David & International Association for Mathematical Geology. Ethanol fuels , energy balance, economics, and environmental impacts are negative.

Dyfyniad Arddull Chicago

Pimentel David and International Association for Mathematical Geology. Ethanol Fuels , Energy Balance, Economics, and Environmental Impacts Are Negative.

Dyfyniad MLA

Pimentel David and International Association for Mathematical Geology. Ethanol Fuels , Energy Balance, Economics, and Environmental Impacts Are Negative.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.