Gaya APA

Spencer, L, M., Spencer, S, M. (1993). Competence At Work : Models For Superior Perfomance . Canada: John Wiley & Sons Inc..

Gaya MLA

Spencer, Lyle, M.., Spencer, Signe, M.. "Competence At Work : Models For Superior Perfomance". Canada: John Wiley & Sons Inc., 1993. Text.