Bumpus Bernard. (1980). Seventy years of international broadcasting. Unesco.
芝加哥风格引文Bumpus Bernard. Seventy Years of International Broadcasting. Paris: Unesco, 1980.
MLA引文Bumpus Bernard. Seventy Years of International Broadcasting. Unesco, 1980.
警告：这些引文格式不一定是100％准确.