How to Upgrade MacBook Pro RAM (2009, 2010, 2011, 2012): EveryMac.com
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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
A-Tech 16GB Kit (2x8GB) RAM for Apple MacBook Pro (Mid 2012), iMac (Late 2012, Early/
How to Upgrade MacBook Pro RAM (2009, 2010, 2011, 2012): EveryMac.com