Dyfyniad APA

Poroma, D., Cerda, R., Somarriba, E., Cifuentes, M., & Guerra, L. (2013). Carbon Footprint: What is it and how to measure it?

Dyfyniad Arddull Chicago

Poroma, D., Rolando Cerda, Eduardo Somarriba, M. Cifuentes, y L. Guerra. Carbon Footprint: What Is It and How to Measure It? 2013.

Dyfyniad MLA

Poroma, D., et al. Carbon Footprint: What Is It and How to Measure It? 2013.

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