Cita APA (7a ed.)

Leymann, H. (1990). Mobbing and psychological terror at workplaces. [s.n.].

Cita Chicago Style (17a ed.)

Leymann, Heinz. Mobbing and Psychological Terror at Workplaces. [S.l.]: [s.n.], 1990.

Cita MLA (9a ed.)

Leymann, Heinz. Mobbing and Psychological Terror at Workplaces. [s.n.], 1990.