APA

UICN'S Commission on National Parks and Protected Areas, .Categories, objetives and criteria for protected areas. : .

Chicago

UICN'S Commission on National Parks and Protected Areas, .Categories, objetives and criteria for protected areas. : .

Harvard

UICN'S Commission on National Parks and Protected Areas, .Categories, objetives and criteria for protected areas. : .

MLA

UICN'S Commission on National Parks and Protected Areas, .: . .