Não informado. (1961). Housing and planning references. Department of Housing and Urban Development.
Citação do estilo Chicago (17ª ed.)Não informado. Housing and Planning References. Washington: Department of Housing and Urban Development, 1961.
Citação MLA (8ª ed.)Não informado. Housing and Planning References. Department of Housing and Urban Development, 1961.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.