Não informado. (1952). Public relations. Institute of Public Relations.
Chicagoスタイル(17版)引用形式Não informado. Public Relations. London: Institute of Public Relations, 1952.
MLA(8版)引用形式Não informado. Public Relations. Institute of Public Relations, 1952.
警告: この引用は必ずしも正確ではありません.