Cita APA (7a ed.)

Balboa, O., Delgado, F., & Voelker, R. (1979). Incompetence of Esophagie Inferior Sphincter. Their Relation with Intrathoracic and Intraabdominal Pressures.

Cita Chicago Style (17a ed.)

Balboa, Oscar, Fernando Delgado, y Ricardo Voelker. Incompetence of Esophagie Inferior Sphincter. Their Relation with Intrathoracic and Intraabdominal Pressures. 1979.

Cita MLA (9a ed.)

Balboa, Oscar, et al. Incompetence of Esophagie Inferior Sphincter. Their Relation with Intrathoracic and Intraabdominal Pressures. 1979.