MacBook Pro 15" Retina Display Mid 2012 Teardown - iFixit
MacBook Pro 15" Unibody Early 2011 RAM Replacement - iFixit Repair Guide
MacBook Pro: How to remove or install memory - Apple Support
Mid-2012 Macbook Pro 16GB RAM Upgrade How To - YouTube
How to Upgrade MacBook Pro RAM (2009, 2010, 2011, 2012): EveryMac.com
MacBook Pro 13" Retina 2.5GHz Logic Board, Late 2012 - 661-7006
OWC 16GB (2x8GB) ram Upgrade PC3-12800 DDR3L 1600MHz sodimm 204 Pin CL11 Memory Upgrade Kit Compatible with Late iMac, Mac Mini, and MacBook Pro Computer at Amazon.com
Apple Macbook Pro Laptop 15" 2.3Ghz - 3.3Ghz Core i7 - Up to 16GB & 2TB SSHD
How to Upgrade RAM on MacBook Pro, iMac & More | AVG
Refurbished 2015 Apple MacBook Pro Quad Core i7 2.8 15" Dual Graphics 16GB RAM 2TB SSD MJLU2LL/A A1398
Amazon.com: Odyson - Logic Board 2.3GHz i7, 16GB Replacement for MacBook Pro 15" Retina A1398 (Mid 2012, Early 2013) : Electronics
Does the mid-2012 13 MacBook Pro have an M.2 slot that I can use for an Intel Optane memory upgrade? - Quora
Pixelpalooza: 15“ Retina MacBook Pro reviewed | Ars Technica