APA

Gebhard K., Meyer M. & Roth S. (2007). Sustainable tourism management: planning in biosphere reserves : a methodology guide. Bonn: Ecological Tourism in Europe.

Chicago

Gebhard Katrin, Meyer Michael and Roth Stephanie. 2007. Sustainable tourism management: planning in biosphere reserves : a methodology guide. Bonn: Ecological Tourism in Europe.

Harvard

Gebhard K., Meyer M. and Roth S. (2007). Sustainable tourism management: planning in biosphere reserves : a methodology guide. Bonn: Ecological Tourism in Europe.

MLA

Gebhard Katrin, Meyer Michael and Roth Stephanie. Sustainable tourism management: planning in biosphere reserves : a methodology guide. Bonn: Ecological Tourism in Europe. 2007.