How to Upgrade MacBook Pro RAM (2009, 2010, 2011, 2012): EveryMac.com
2012 Macbook Pro 15" A1286 RAM Upgrade - YouTube
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
Memory RAM Upgrades for MacBook Pro (2012 - Late 2016)
13-inch MacBook Air (Mid 2012)
How to Upgrade RAM on MacBook Pro, iMac & More | AVG
CMS 16GB (2X8GB) DDR3 12800 1600MHz Non ECC SODIMM Memory Ram Upgrade Compatible with Apple® MacBook Pro Core I5 2.5 13" Mid-2012 - A7 at Amazon.com