Cita APA (7a ed.)

Halpern, S. H., & Douglas, M. J. (2007). Evidence-Based Obstetric Anesthesia. John Wiley & Sons.

Cita Chicago Style (17a ed.)

Halpern, Stephen H., y M. Joanne Douglas. Evidence-Based Obstetric Anesthesia. Chichester: John Wiley & Sons, 2007.

Cita MLA (8a ed.)

Halpern, Stephen H., y M. Joanne Douglas. Evidence-Based Obstetric Anesthesia. John Wiley & Sons, 2007.