Cita APA

Horback, K., & Eagles, P. F. J. (1999). Guidelines for public use measurement and reporting at parks and protected areas (1a. ed.). Switzerland: IUCN.

Citación estilo Chicago

Horback, Kenneth, y Paul F. J. Eagles. Guidelines for Public Use Measurement and Reporting At Parks and Protected Areas. 1a. ed. Switzerland: IUCN, 1999.

Cita MLA

Horback, Kenneth, y Paul F. J. Eagles. Guidelines for Public Use Measurement and Reporting At Parks and Protected Areas. 1a. ed. Switzerland: IUCN, 1999.