Cita APA (7a ed.)

Bortagaray, C., & Errandonea, J. (1973). Intraduodenal foreign body.

Cita Chicago Style (17a ed.)

Bortagaray, Carlos, y Jorge Errandonea. Intraduodenal Foreign Body. 1973.

Cita MLA (9a ed.)

Bortagaray, Carlos, y Jorge Errandonea. Intraduodenal Foreign Body. 1973.