PDF rendering of Wikipedia: Spoken word album.
Caption: In the Mad Men (season 6) episode, "The Man With a Plan", Bob Benson was shown listening to the audio version of Frank Bettger's book How I Raised Myself from Failure to Success in Selling (1952),* on a phonograph in his office. The citation includes a link to a screenshot of him with the book in his lap.**
**"Bob Benson listening to the audio version of the book How I Raised Myself From Failure to Success In Selling, by Frank Bettger". Pinterest: New York Public Library Collection.