APA استشهاد

U.S Department, O. A. (1974). 1974 Yearbook of Agriculture. U.S Govt ptinting office.

استشهاد بنمط شيكاغو

U.S Department, Of Agriculture. 1974 Yearbook of Agriculture. Washington: U.S Govt ptinting office, 1974.

MLA استشهاد

U.S Department, Of Agriculture. 1974 Yearbook of Agriculture. U.S Govt ptinting office, 1974.