Cita APA

Underwood, M. J., & Bailey, J. S. (1993). Access to heart surgery for smokers: Authors' reply.

Citación estilo Chicago

Underwood, M J., y J S. Bailey. Access to Heart Surgery for Smokers: Authors' Reply. 1993.

Cita MLA

Underwood, M J., y J S. Bailey. Access to Heart Surgery for Smokers: Authors' Reply. 1993.