Cita APA (7th ed.)
Hagman, R., & Selvig, E. (2007). Environmentally friendly vehicles: Experiences and definitions. Nordic Council of Ministers.
Cita Chicago (17th ed.)
Hagman, Rolf, i Eivind Selvig. Environmentally Friendly Vehicles: Experiences and Definitions. Copenhagen: Nordic Council of Ministers, 2007.
Cita MLA (9th ed.)
Hagman, Rolf, i Eivind Selvig. Environmentally Friendly Vehicles: Experiences and Definitions. Nordic Council of Ministers, 2007.
Atenció: Aquestes cites poden no estar 100% correctes.