Cita APA (7a ed.)
FUENTE, L. D. L., & ET AL. (1999). DECLINING PREVALENCE OF INJECTION AS MAIN ROUTE OF ADMINISTRATION AMONG HEROIN USERS TREATED IN SPAIN, 1991-1993.
Cita Chicago Style (17a ed.)
FUENTE, L. DE LA, y ET AL. DECLINING PREVALENCE OF INJECTION AS MAIN ROUTE OF ADMINISTRATION AMONG HEROIN USERS TREATED IN SPAIN, 1991-1993. 1999.
Cita MLA (9a ed.)
FUENTE, L. DE LA, y ET AL. DECLINING PREVALENCE OF INJECTION AS MAIN ROUTE OF ADMINISTRATION AMONG HEROIN USERS TREATED IN SPAIN, 1991-1993. 1999.
Precaución: Estas citas no son 100% exactas.