Tan, R. R. Are negative carbon emissions possible. IN Star Science. The Philippine Star.
Cita Chicago Style (17a ed.)Tan, Raymond R. "Are Negative Carbon Emissions Possible. IN Star Science." The Philippine Star .
Cita MLA (9a ed.)Tan, Raymond R. "Are Negative Carbon Emissions Possible. IN Star Science." The Philippine Star, .
Precaución: Estas citas no son 100% exactas.