Competence at work
Spencer Lyle M., Spencer Signe M.Kniha
Citace v seznamu literatury:
SPENCER, Lyle M. a SPENCER, Signe M. Competence at work: models for superior performance. New York: John Wiley, c1993. ISBN 047154809X. Dostupné také z: http://www.loc.gov/catdir/description/wiley034/92031255.html.