Guđjónsson, G. (1993). Violent crime in Iceland. FBI National Academy.
Cita Chicago Style (17a ed.)Guđjónsson, Guđmundur. Violent Crime in Iceland. [S.l.]: FBI National Academy, 1993.
Cita MLA (9a ed.)Guđjónsson, Guđmundur. Violent Crime in Iceland. FBI National Academy, 1993.
Precaución: Estas citas no son 100% exactas.