How to Upgrade MacBook Pro RAM (2009, 2010, 2011, 2012): EveryMac.com
16GB MacBook Pro RAM Upgrade (2011/2012/2013) - YouTube
Amazon.com: Timetec 8GB KIT(2x4GB) 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 15" Retina Display Mid 2012 Teardown - iFixit
Amazon.com: Timetec 8GB KIT(2x4GB) 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
Mid-2012 Macbook Pro 16GB RAM Upgrade How To - YouTube
16 GB RAM Upgrade on MacBook Pro 15" (mid 2012) NON Retina - YouTube
Apple MacBook Pro Early 2011 Crucial Memory Upgrade - YouTube
Adamanta 16GB (2x8GB) Apple Memory Upgrade DDR3L 1600MHz SODIMM Compatible for iMac (Mid 2011, Late 2012, Early/Late 2013, Late 2014, Mid 2015), MacBook Pro (Early/Late 2011, Mid 2012), Mac Mini at Amazon.com
How to Upgrade MacBook Pro RAM (2009, 2010, 2011, 2012): EveryMac.com