MacBook Pro 13" Unibody A1278 (Mid 2012) RAM Upgrade Kit
upgrade - 32gb of RAM on a 2011 or 2012 15/17-inch MacBook Pro using Crucial's 16gb single DIMMs - Ask Different
Apple macbook pro 13 inch mid 2012 (Maximum RAM and SSD Dual Storage Upgrade) | eBay
Amazon.com: A-Tech 32GB Kit (4x8GB) RAM for Apple Mac Pro Early 2009, Mid 2010, Mid 2012 (4-Core, 6-Core, 8-Core, 12-Core) | DDR3 1066MHz PC3-8500R ECC RDIMM 2Rx4 1.5V 240-Pin Registered DIMM Memory
Upgrading a 2010 MacBook Pro - Can I make it better than new? (RAM + SSD) - YouTube
16GB 8GB 4GB DDR3 1600MHz RAM for Apple MacBook Pro Mid 2012 sodimm Memory lot | eBay
A-Tech 16GB Kit (2x8GB) RAM for Apple MacBook Pro (Mid 2012), iMac (Late 2012, Early/Late 2013, Late 2014, Mid 2015), Mac Mini (Late 2012) | DDR3 1600MHz PC3-12800 SODIMM 204-Pin Memory Upgrade at Amazon.com