Cita APA (7th ed.)

Union of European academies for science applied to agriculture, food and nature, Hera, C., Hoffmann, V., & Rivza, B. (2008). Renewable energy recources, production and technologies.

Cita Chicago (17th ed.)

Union of European academies for science applied to agriculture, food and nature, Cristian Hera, Volker Hoffmann, i Baiba Rivza. Renewable Energy Recources, Production and Technologies. 2008.

Cita MLA (9th ed.)

Union of European academies for science applied to agriculture, food and nature, et al. Renewable Energy Recources, Production and Technologies. 2008.