Cunningham, F. G. (2011). Williams Obstetricia <i>es</i>.
Cita Chicago (17th ed.)Cunningham, F. Gary. Williams Obstetricia <i>es</i>. 2011.
Cita MLA (9th ed.)Cunningham, F. Gary. Williams Obstetricia <i>es</i>. 2011.
Atenció: Aquestes cites poden no estar 100% correctes.