NEMIX RAM 16GB Kit (2x8GB Upgrade) DDR3-1600 SODIMM PC3-12800 for Apple MacBook Pro Mid 2012 / iMac Late 2012 / iMac 2013, Late 2014, Mid 2015, Mac Mini Late 2012 at Amazon.com
Amazon.com: Timetec 16GB KIT(2x8GB) Compatible for Apple DDR3L 1600MHz for Mac Book Pro(Early/Late 2011,Mid 2012), iMac(Mid 2011,Late 2012,Early/Late 2013,Late 2014,Mid 2015), Mac Mini(Mid 2011,Late 2012) MAC RAM : Electronics
MacBook Pro: How to remove or install memory - Apple Support
Apple MacBook Pro 13" (2012) Core i5, 8GB RAM 500GB HDD - Silver (Refurbished) | Macworld
MacBook Pro Memory Model 9.1 to 9.2 | Mid 2012 | 4GB | MacMemory.com