Gaya APA
      Lewis, S, M. et al (1991).
    Medical surgical nursing: assessment and management of clinical problems .
    Boston:
  SAUDERS COMPANY.
  
Gaya MLA
      Lewis, Sharon, Mantik. et al.
    "Medical surgical nursing: assessment and management of clinical problems".
    
    Boston:
  SAUDERS COMPANY,
  1991.
  Text.