Dyfyniad APA

United States. National Park Service, Smithsonian Institution, & Festival of American Folklife. (1991). Festival of American Folklife, June 28-July 1 and July 4-July 7. Smithsonian Institution.

Dyfyniad Arddull Chicago

United States. National Park Service, Smithsonian Institution, and Festival of American Folklife. Festival of American Folklife, June 28-July 1 and July 4-July 7. [Washington, D.C.]: Smithsonian Institution, 1991.

Dyfyniad MLA

United States. National Park Service, et al. Festival of American Folklife, June 28-July 1 and July 4-July 7. Smithsonian Institution, 1991.

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