Παραπομπή σε μορφή APA (7η εκδ.)
Cardiff University. Department of City and Regional Planning, IUCN. World Commission on Protected Areas (WCPA), IUCN, & Phillips Adrian. (1998). Economic values of protected areas: Guidelines for protected area managers. IUCN.
Παραπομπή σε μορφή Chicago (17η εκδ.)
Cardiff University. Department of City and Regional Planning, IUCN. World Commission on Protected Areas (WCPA), IUCN, και Phillips Adrian. Economic Values of Protected Areas: Guidelines for Protected Area Managers. IUCN, 1998.
Παραπομπή σε μορφή MLA (9th εκδ.)
Cardiff University. Department of City and Regional Planning, et al. Economic Values of Protected Areas: Guidelines for Protected Area Managers. IUCN, 1998.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.