A-Tech 8GB Kit (2x4GB) 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
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 PC3-12800 SODIMM 204-Pin Memory Upgrade at Amazon.com
Apple MacBook Pro (Retina, 13-inch, Mid 2014) Silver, 8GB RAM, 128GB SSD MacOS Big Sur (11) Used (Grade A) - One Bite Technology - St. Albert
15" MacBook Pro Retina A1398 - Logic Board Mid 2014
Apple MacBook Pro with Retina Display (13-inch, 2015) review: Apple's 2015 MacBook Pro is still around for those who want fewer dongles - CNET
How to upgrade Apple MacBook Pro RAM - YouTube
15 inch Apple MacBook Pro Retina A1398 Logic Board 2.8Ghz i7 16Gb Ram Mid 2014 - TEKDEP
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
MacBook Pro 15" 2014 A1398 2.2Ghz i7 Logic Board 16GB RAM + Parts bundle WORKS | Being Patient
Logic Board for 15" MacBook Pro Retina Mid 2014 -- i7-4770HQ IG 2.2GHz - Part Haven
How to upgrade a Mac: Swap in new RAM, graphics card, hard drive and more | Macworld
iFixit Launches Repair Guides for Retina MacBook Pro - MacRumors