POSNER, G. D., & DY, J. (2013). Oxorn- Foote Human Labor & Birth. Mc Grawhill.
Cita Chicago (17th ed.)POSNER, Glenn D., i Jessica DY. Oxorn- Foote Human Labor & Birth. Mc Grawhill, 2013.
Cita MLA (9th ed.)POSNER, Glenn D., i Jessica DY. Oxorn- Foote Human Labor & Birth. Mc Grawhill, 2013.
Atenció: Aquestes cites poden no estar 100% correctes.