APA

Beauchamp Tom L, Childress James F, . (2001). Principles of biomedical ethics. Oxford: Oxford University Press.

Chicago

Beauchamp Tom L, Childress James F, . 2001. Principles of biomedical ethics. Oxford: Oxford University Press.

Harvard

Beauchamp Tom L, Childress James F, . (2001). Principles of biomedical ethics. Oxford: Oxford University Press.

MLA

Beauchamp Tom L, Childress James F, . Principles of biomedical ethics. Oxford: Oxford University Press. 2001.