advertising: Brands pull back advertising on radio in 2020, Marketing & Advertising News, ET BrandEquity
![File:Vintage Radio Advertising - RCA Victor, "The Pick of the Portables", From Collier's Magazine, May 8, 1948 (9702769429).jpg - Wikimedia Commons File:Vintage Radio Advertising - RCA Victor, "The Pick of the Portables", From Collier's Magazine, May 8, 1948 (9702769429).jpg - Wikimedia Commons](https://upload.wikimedia.org/wikipedia/commons/2/2b/Vintage_Radio_Advertising_-_RCA_Victor%2C_%22The_Pick_of_the_Portables%22%2C_From_Collier%27s_Magazine%2C_May_8%2C_1948_%289702769429%29.jpg)
File:Vintage Radio Advertising - RCA Victor, "The Pick of the Portables", From Collier's Magazine, May 8, 1948 (9702769429).jpg - Wikimedia Commons
![The 7 Secrets of Creative Radio Advertising - Kindle edition by Hertz, Tony. Reference Kindle eBooks @ Amazon.com. The 7 Secrets of Creative Radio Advertising - Kindle edition by Hertz, Tony. Reference Kindle eBooks @ Amazon.com.](https://images-na.ssl-images-amazon.com/images/I/81YQdMCRcqL._AC_UL600_SR600,600_.jpg)