APA

Zerda A. [. a., Vel_squez G., Tobar F. & Enrique Vargas J. (2002). Health insurance systems and access to medicines : case studies from Argentina, Chile, Colombia, Costa Rica, Guatemala and the United States of America. Washington, D.C: Pan American Health Organization.

Chicago

Zerda Alvaro [et al.], Vel_squez Germ_n, Tobar Federica and Enrique Vargas Jorge. 2002. Health insurance systems and access to medicines : case studies from Argentina, Chile, Colombia, Costa Rica, Guatemala and the United States of America. Washington, D.C: Pan American Health Organization.

Harvard

Zerda A. [. a., Vel_squez G., Tobar F. and Enrique Vargas J. (2002). Health insurance systems and access to medicines : case studies from Argentina, Chile, Colombia, Costa Rica, Guatemala and the United States of America. Washington, D.C: Pan American Health Organization.

MLA

Zerda Alvaro [et al.], Vel_squez Germ_n, Tobar Federica and Enrique Vargas Jorge. Health insurance systems and access to medicines : case studies from Argentina, Chile, Colombia, Costa Rica, Guatemala and the United States of America. Washington, D.C: Pan American Health Organization. 2002.