APA (7th ed.) Citation

Bumpus Bernard. (1980). Seventy years of international broadcasting. Unesco.

Chicago Style (17th ed.) Citation

Bumpus Bernard. Seventy Years of International Broadcasting. Paris: Unesco, 1980.

MLA (9th ed.) Citation

Bumpus Bernard. Seventy Years of International Broadcasting. Unesco, 1980.

Warning: These citations may not always be 100% accurate.