Dyfyniad APA

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.

Dyfyniad Arddull Chicago

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.

Dyfyniad MLA

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.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.