Cita APA

World Commission on Protected Areas (WCPA), & Watson, J. (1997). Guidelines for cave and karst protection. Suiza: IUCN.

Citación estilo Chicago

World Commission on Protected Areas (WCPA), y John Watson. Guidelines for Cave and Karst Protection. Suiza: IUCN, 1997.

Cita MLA

World Commission on Protected Areas (WCPA), y John Watson. Guidelines for Cave and Karst Protection. Suiza: IUCN, 1997.