Macbook Pro 15" Retina A1398 Take Apart (2012 Model) - YouTube
MacBook Pro 15" Retina Display Mid 2012 Teardown - iFixit
MacBook Pro (Retina, 13-inch, Late 2012) - Technical Specifications
Logic Board 2.9Ghz i7 8Gb Ram for 13" Apple MacBook Pro Retina A1425 Late 2012 | eBay
Memory RAM Upgrades for MacBook Pro (2012 - Late 2016)
mac - What is the maximum RAM size for MacBook Pro Mid 2012? - Ask Different
MacBook Pro 13" Retina Display Late 2012 Teardown - iFixit
13-inch Retina MacBook Pro Review (Late 2012)
Samsung ram Memory Upgrade DDR3 PC3 12800, 1600MHz, 204 PIN, SODIMM for 2012 Apple MacBook Pro's, 2012 iMac's, and 2011/2012 Mac Mini's (8GB kit (2 x 4GB)) at Amazon.com
A-Tech 8GB RAM for Apple MacBook Pro (Mid 2012), iMac (Late 2012, Early/Late 2013, Late 2014, Mid 2015), Mac Mini (Late 2012) | DDR3 1600MHz SODIMM PC3-12800 204-Pin SO-DIMM Memory Upgrade at Amazon.com