apple-history.com / MacBook Pro (Retina, 15-inch, Mid 2014)
16GB to 32GB Soldered RAM Upgrade - 2018 MacBook Pro 15-inch - 4K - YouTube
Apple MacBook Pro Retina 15" (256GB SSD, Intel Core i7 4th Gen., 2.20 GHz, 16GB) Laptop - Silver - MGXA2LL/A (Mid 2014) for sale online | eBay
MacBook Pro (Retina, 15-inch, Mid 2014) - Technical Specifications
macbook pro - Can I upgrade RAM on late 2013 retina Mac Book Pro? - Ask Different
How to install an SSD on a 15-inch Retina MacBook Pro
Review: Apple's mid-2014 15-inch MacBook Pro with Retina display | AppleInsider
Apple MacBook Pro with Retina Display (15-inch, 2014) review: Still the best higher-res laptop, but the competition is catching up - CNET
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 15 Retina - Mid 2014 Reviews, Pros and Cons | TechSpot