Cita APA (7a ed.)

European Topic Centre on Nature Conservation, Agencia Europea de Medio Ambiente, & Pinborg, U. (1998). Nature conservation: Annual topic update 1997. Office for Official Publications of the European Communities.

Cita Chicago Style (17a ed.)

European Topic Centre on Nature Conservation, Agencia Europea de Medio Ambiente, y Ulla Pinborg. Nature Conservation: Annual Topic Update 1997. Luxembourg: Office for Official Publications of the European Communities, 1998.

Cita MLA (9a ed.)

European Topic Centre on Nature Conservation, et al. Nature Conservation: Annual Topic Update 1997. Office for Official Publications of the European Communities, 1998.