World Conference on National Parks. 1st Seattle, 1962. (1962). First world conference on national parks; proceeding. National Park Service, U.S. Department of the Interior.
Chicago-Zitierstil (17. Ausg.)World Conference on National Parks. 1st Seattle, 1962. First World Conference on National Parks; Proceeding. Washington: National Park Service, U.S. Department of the Interior, 1962.
MLA-Zitierstil (9. Ausg.)World Conference on National Parks. 1st Seattle, 1962. First World Conference on National Parks; Proceeding. National Park Service, U.S. Department of the Interior, 1962.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.