Não informado. (1984). Year book of digestive diseases. Year Book Medical Publishers.
Cita Chicago Style (17a ed.)Não informado. Year Book of Digestive Diseases. Chicago, Ill: Year Book Medical Publishers, 1984.
Cita MLA (8a ed.)Não informado. Year Book of Digestive Diseases. Year Book Medical Publishers, 1984.
Precaución: Estas citas no son 100% exactas.