Zapf, D., Einarsen, S., Hoel, H. & Vartia, M (2003). Empirical findings on bullying in the workplace. En S. Einarsen, H. Hoel, D. Zapf & C. L. Cooper (Eds.), Bullying and emotional abuse in the work-place:International perspectives in research and practice (pp. 103-126). London: Taylor and Francis.
