http://www.macworld.com/article/2934744/software-music/apple-music-faq-the-ins-and-outs-of-apples-new-streaming-music-service.html

https://www.theverge.com/2017/5/17/15654064/apple-music-exclusives-cutting-back-jimmy-iovine

https://www.theverge.com/2017/2/10/14575452/spotify-katy-perry-single-exclusives-ad-campaign

https://www.bloomberg.com/news/articles/2017-02-10/spotify-befriends-katy-perry-in-quest-to-win-artists-favor?cmpid=socialflow-twitter-business&utm_content=business&utm_campaign=socialflow-organic&utm_source=twitter&utm_medium=social

https://www.bloomberg.com/news/articles/2017-06-21/apple-said-to-seek-lower-rate-in-new-deals-with-record-labels

https://www.bloomberg.com/news/articles/2017-04-09/jay-z-goes-missing-from-spotify-as-rapper-pulls-out-his-albums

https://assets.bwbx.io/images/users/iqjWHBFdfxIU/i_SsFVyHGaNA/v1/-1x-1.png

https://www.digitaltrends.com/music/apple-music-vs-spotify/