Comisión de las Comunidades Europeas. Dirección General de Medio Ambiente. (2001). Sustainable tourism and natura 2000: Guidelines, initiatives and good practices in Europe : final publication based on the Lisbon seminar, December 1999. Office for Official Publications of the European Communities.
Cita Chicago Style (17a ed.)Comisión de las Comunidades Europeas. Dirección General de Medio Ambiente. Sustainable Tourism and Natura 2000: Guidelines, Initiatives and Good Practices in Europe : Final Publication Based on the Lisbon Seminar, December 1999. Luxembourg: Office for Official Publications of the European Communities, 2001.
Cita MLA (9a ed.)Comisión de las Comunidades Europeas. Dirección General de Medio Ambiente. Sustainable Tourism and Natura 2000: Guidelines, Initiatives and Good Practices in Europe : Final Publication Based on the Lisbon Seminar, December 1999. Office for Official Publications of the European Communities, 2001.
