APA (7th ed.) Citation

Douglas, G. H. (1987). The early days of radio broadcasting. McFarland.

Chicago Style (17th ed.) Citation

Douglas, George H. The Early Days of Radio Broadcasting. Jefferson, NC [u.a.]: McFarland, 1987.

MLA (9th ed.) Citation

Douglas, George H. The Early Days of Radio Broadcasting. McFarland, 1987.