APA (7th ed.) Citation

Callen, P. W. (2009). EcografÝa en obstetricia y ginecologÝa <i>es</i>.

Chicago Style (17th ed.) Citation

Callen, Peter W. EcografÝa En Obstetricia Y GinecologÝa <i>es</i>. 2009.

MLA (9th ed.) Citation

Callen, Peter W. EcografÝa En Obstetricia Y GinecologÝa <i>es</i>. 2009.

Warning: These citations may not always be 100% accurate.