Cita APA (7a ed.)

Zapf, D. (1999). Organisational, work group related and personal causes of mobbing-bullying at work. [s.n.].

Cita Chicago Style (17a ed.)

Zapf, Dieter. Organisational, Work Group Related and Personal Causes of Mobbing-bullying at Work. [S.l.]: [s.n.], 1999.

Cita MLA (9a ed.)

Zapf, Dieter. Organisational, Work Group Related and Personal Causes of Mobbing-bullying at Work. [s.n.], 1999.