APA-viite (7. p.)

United States. Dept. of Agriculture. (1921). Yearbook. G.P.O..

Chicago-viite (17. p.)

United States. Dept. of Agriculture. Yearbook. Washington: G.P.O., 1921.

MLA-viite (8. p.)

United States. Dept. of Agriculture. Yearbook. G.P.O., 1921.