Cita APA (7th ed.)
Balboa, O., Delgado, F., & Voelker, R. (1979). Incompetence of Esophagie Inferior Sphincter. Their Relation with Intrathoracic and Intraabdominal Pressures.
Cita Chicago (17th ed.)
Balboa, Oscar, Fernando Delgado, i Ricardo Voelker. Incompetence of Esophagie Inferior Sphincter. Their Relation with Intrathoracic and Intraabdominal Pressures. 1979.
Cita MLA (9th ed.)
Balboa, Oscar, et al. Incompetence of Esophagie Inferior Sphincter. Their Relation with Intrathoracic and Intraabdominal Pressures. 1979.
Atenció: Aquestes cites poden no estar 100% correctes.