Gaya APA

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

Gaya MLA

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