Black, S. (1978). Practical public relations (4th.). Pitman.
Chicago-čujuhus (17. p.)Black, Sam. Practical Public Relations. 4th. London: Pitman, 1978.
MLA-čujuhus (9. p.)Black, Sam. Practical Public Relations. 4th. Pitman, 1978.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.