Cita APA (7a ed.)
Poroma, D., Cerda, R., Somarriba, E., Cifuentes, M., & Guerra, L. (2015). Carbon Footprint: What is it and how to measure it?
Cita Chicago Style (17a ed.)
Poroma, D., Rolando Cerda, Eduardo Somarriba, M. Cifuentes, y L. Guerra. Carbon Footprint: What Is It and How to Measure It? 2015.
Cita MLA (9a ed.)
Poroma, D., et al. Carbon Footprint: What Is It and How to Measure It? 2015.
Precaución: Estas citas no son 100% exactas.