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.
芝加哥风格引文United States. National Park Service, Smithsonian Institution, 与 Festival of American Folklife. Festival of American Folklife, June 28-July 1 and July 4-July 7. [Washington, D.C.]: Smithsonian Institution, 1991.
MLA引文United States. National Park Service, et al. Festival of American Folklife, June 28-July 1 and July 4-July 7. Smithsonian Institution, 1991.
警告：这些引文格式不一定是100％准确.