Cita APA

 Pence, G. E. (2007).  The elements of bioethics.  McGraw-Hill.

Chicago Style Citation

 Pence, Gregory E.  The Elements of Bioethics.  McGraw-Hill, 2007.

Cita MLA

 Pence, Gregory E.  The Elements of Bioethics.  McGraw-Hill, 2007.