Cita APA (7th ed.)

Popa, M. E., Vollmer, M. K., Jordan, A., Brand, W. A., Pathirana, S. L., Rothe, M., & Röckmann, T. (2014). Vehicle emissions of greenhouse gases and related tracers from a tunnel study: CO : CO₂, N₂O : CO₂, CH₄ : CO₂, O₂ : CO₂ ratios, and the stable isotopes ¹³C and ¹⁸O in CO₂ and CO. Copernicus Publications.

Cita Chicago (17th ed.)

Popa, M. E., M. K. Vollmer, A. Jordan, W. A. Brand, S. L. Pathirana, M. Rothe, i T. Röckmann. Vehicle Emissions of Greenhouse Gases and Related Tracers from a Tunnel Study: CO : CO₂, N₂O : CO₂, CH₄ : CO₂, O₂ : CO₂ Ratios, and the Stable Isotopes ¹³C and ¹⁸O in CO₂ and CO. Copernicus Publications, 2014.

Cita MLA (9th ed.)

Popa, M. E., et al. Vehicle Emissions of Greenhouse Gases and Related Tracers from a Tunnel Study: CO : CO₂, N₂O : CO₂, CH₄ : CO₂, O₂ : CO₂ Ratios, and the Stable Isotopes ¹³C and ¹⁸O in CO₂ and CO. Copernicus Publications, 2014.