Não informado. (1961). American Family Physician. American Academy of General Practice.
Citação do estilo Chicago (17ª ed.)Não informado. American Family Physician. Kansas City, Kan: American Academy of General Practice, 1961.
Citação MLA (8ª ed.)Não informado. American Family Physician. American Academy of General Practice, 1961.
Предупреждение: эти цитированмия не могут быть всегда правильны на 100%.