Não informado. (1970). American Family Physician/GP. American Academy of General Practice.
Citação do estilo Chicago (17ª ed.)Não informado. American Family Physician/GP. Kansas City, Kan: American Academy of General Practice, 1970.
Citação MLA (8ª ed.)Não informado. American Family Physician/GP. American Academy of General Practice, 1970.
警告：这些引文格式不一定是100％准确.