APA引文

U.S. Bureau of the Census. (1951). Census of manufactures, 1949, Purto Rico. s.n.

Chicago Style (17th ed.) Citation

U.S. Bureau of the Census. Census of Manufactures, 1949, Purto Rico. Washington: s.n, 1951.

MLA引文

U.S. Bureau of the Census. Census of Manufactures, 1949, Purto Rico. s.n, 1951.