BLACK, S. (1994). Practical Public Relations Sam Black. Universal Bookshall.
Cita Chicago Style (17a ed.)BLACK, Sam. Practical Public Relations Sam Black. Universal Bookshall, 1994.
Cita MLA (8a ed.)BLACK, Sam. Practical Public Relations Sam Black. Universal Bookshall, 1994.
Precaución: Estas citas no son 100% exactas.