Cita APA (7a ed.)

Luhmann, N. (1993). Risk: A sociological theory. Walter de Gruyter.

Cita Chicago Style (17a ed.)

Luhmann, Niklas. Risk: A Sociological Theory. Berlin [etc.]: Walter de Gruyter, 1993.

Cita MLA (9a ed.)

Luhmann, Niklas. Risk: A Sociological Theory. Walter de Gruyter, 1993.