APA
World Health Organization, . (2002). WHO Model Formulary 2002. World Health Organization: UK.
Chicago
World Health Organization, . 2002. WHO Model Formulary 2002. World Health Organization: UK.
Harvard
World Health Organization, . (2002). WHO Model Formulary 2002. World Health Organization: UK.
MLA
World Health Organization, . WHO Model Formulary 2002. World Health Organization: UK. 2002.