LEGO 5000646: City poster | Brickset: LEGO set guide and database
LEGO City Poster - 2011 1 of 3 / Alien Conquest (Double-Sided) | Brick Owl - LEGO Marketplace
City Poster Police, Single Sided (6071357/6075969) : Gear 6071357c | BrickLink
Mike Rayhawk on Twitter: "A bunch of my posters came out in the last couple of months and I didn't notice because they were in the version of the magazine for kids