http://www.visualistan.com/2016/06/the-ultimate-2016-social-media-ad-size-cheat-sheet.html#postimages-2
Posted in M2_PR Social Media: Netzwerke & Tools T2
http://www.visualistan.com/2016/06/the-ultimate-2016-social-media-ad-size-cheat-sheet.html#postimages-2