United States. Dept. of Housing and Urban Development. (1968). Statistical yearbook. s.n.
Citazione stile Chigago Style (17a edizione)United States. Dept. of Housing and Urban Development. Statistical Yearbook. Washington, D.C: s.n, 1968.
Citatione MLA (9a ed.)United States. Dept. of Housing and Urban Development. Statistical Yearbook. s.n, 1968.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.