Cita APA (7a ed.)

Garcia Pierce, H., Carriquiry, L. A., Olivera, D., Bergalli, L., Blasiak, J., & Pradines, J. (1978). Cricopharyngeal achalasia: Surgical treatment. Three cases.

Cita Chicago Style (17a ed.)

Garcia Pierce, Héctor, Luis A. Carriquiry, Daniel Olivera, Luis Bergalli, José Blasiak, y Jorge Pradines. Cricopharyngeal Achalasia: Surgical Treatment. Three Cases. 1978.

Cita MLA (9a ed.)

Garcia Pierce, Héctor, et al. Cricopharyngeal Achalasia: Surgical Treatment. Three Cases. 1978.