Cita APA (7a ed.)

Sociedad Europea de Respiratorio, Torres, A., & Woodhead, M. (1997). Pneumonia. European Respiratory Society Journals.

Cita Chicago Style (17a ed.)

Sociedad Europea de Respiratorio, A. Torres, y M. Woodhead. Pneumonia. Sheffield, U.K.: European Respiratory Society Journals, 1997.

Cita MLA (9a ed.)

Sociedad Europea de Respiratorio, et al. Pneumonia. European Respiratory Society Journals, 1997.