Cita APA (7a ed.)
Georgi Zhelezov. Sustainable Development in Mountain Regions: Southeastern Europe. Springer.
Cita estilo Chicago (17a ed.)
Georgi Zhelezov. Sustainable Development in Mountain Regions: Southeastern Europe. Dordrecht, Holanda: Springer.
Cita MLA (9a ed.)
Georgi Zhelezov. Sustainable Development in Mountain Regions: Southeastern Europe. Springer.
Precaución: Estas citas no son 100% exactas.