Cita APA (7a ed.)

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 (8a ed.)

Guđjónsson, Guđmundur. Violent Crime in Iceland. FBI National Academy, 1993.