Gaya APA

dkk, D, B. (2007). ICD-9-CM 2007 classification of procedures: International Classification of Diseases 9th revision clinical modification . Geneva: WHO.

Gaya MLA

dkk, David, Berglund,. "ICD-9-CM 2007 classification of procedures: International Classification of Diseases 9th revision clinical modification". Geneva: WHO, 2007. Text.