Upgrading RAM in Your MacBook Pro 13" or 15" : 19 Steps (with Pictures) - Instructables
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
Apple: MacBook Pro 15'' Retina Mid-2015: Upgrade RAM to 32Gb - YouTube
Surprise! iFixit says you can't do much to fix or upgrade the 2015 MacBook | Ars Technica
MacBook Pro: How to remove or install memory - Apple Support
Today got this Mid 2015 MacBook Pro 15" Retina , i7@ 2.2GHz, 16gb Ram, 256SSD... ( Not dual gpu ) For $300... Good stuff.... right ? : r/LukeMianiYouTube
MacBook Pro (Retina, 13-inch, Mid 2014) - Technical Specifications
Refurbished 2015 Apple MacBook Pro Core i7 2.8 15" 16GB RAM 2TB SSD