Gaya APA

al., E. et al (2010). Drug Information Handbook (a Comprehensive Resource For All Clinicians And Healthcare Professionals) (Ed. 19). Ohio: Leci-Comp Inc.

Gaya MLA

al., Et. et al. "Drug Information Handbook (a Comprehensive Resource For All Clinicians And Healthcare Professionals)". Ed. 19 Ohio: Leci-Comp Inc, 2010. Text.