APA (7th ed.) Citation

Public Relations World Congress London, England, & Black, S. (1980). Public relations in the 1980's: Proceedings of the eighth Public Relations World Congress, London, 1979. Pergamon.

Chicago Style (17th ed.) Citation

Public Relations World Congress London, England, and Sam Black. Public Relations in the 1980's: Proceedings of the Eighth Public Relations World Congress, London, 1979. Oxford ; New York: Pergamon, 1980.

MLA (9th ed.) Citation

Public Relations World Congress London, England, and Sam Black. Public Relations in the 1980's: Proceedings of the Eighth Public Relations World Congress, London, 1979. Pergamon, 1980.