Παραπομπή APA
Eagles, P. F. J., McCool, S. F., & Haynes, C. D. (2002). Sustainable tourism in protected areas: Quidelines for planning and management. gLand, Swiitzerland: IUCN-The World Conservation Union.
Παραπομπή Chicago StyleEagles, Paul F. J., Stephen F. McCool, and Christopher D. Haynes. Sustainable Tourism in Protected Areas: Quidelines for Planning and Management. gLand, Swiitzerland: IUCN-The World Conservation Union, 2002.
Παραπομπή MLAEagles, Paul F. J., Stephen F. McCool, and Christopher D. Haynes. Sustainable Tourism in Protected Areas: Quidelines for Planning and Management. gLand, Swiitzerland: IUCN-The World Conservation Union, 2002.
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