Não informado. (1972). Health Services Reports. Health Services and Mental Health Administration.
Citação do estilo Chicago (17ª ed.)Não informado. Health Services Reports. Rockville, Md: Health Services and Mental Health Administration, 1972.
Citação MLA (8ª ed.)Não informado. Health Services Reports. Health Services and Mental Health Administration, 1972.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.