Cita APA (7a ed.)
L, K., R, A., M, F., P, K., A, U., & L, W. (2003). Estimating prevalence of problem drug use at national level in countries of the European Union and Norway. Addiction, 98(4), 471-486.
Cita Chicago Style (17a ed.)
L, Kraus, Augustin R, Frischer M, Kümmler P, Uhl A, y Wiessing L. "Estimating Prevalence of Problem Drug Use at National Level in Countries of the European Union and Norway." Addiction 98, no. 4 (2003): 471-486.
Cita MLA (9a ed.)
L, Kraus, et al. "Estimating Prevalence of Problem Drug Use at National Level in Countries of the European Union and Norway." Addiction, vol. 98, no. 4, 2003, pp. 471-486.
Precaución: Estas citas no son 100% exactas.