Gaya APA

Cohen, A, R., Bradford, D, L. (1991). Influence without authority / Allan R. Cohen, David L. Bradford . New York: John Wiley n Sons.

Gaya MLA

Cohen, Allan, R.., Bradford, David, L.. "Influence without authority / Allan R. Cohen, David L. Bradford". New York: John Wiley n Sons, 1991. Textbook.