MacBook Pro (Retina, 13-inch, Late 2013) - Technical Specifications
15" 15 Inch Retina MacBook Pro A1398 Mid 2015 Complete Disassembly (Almost) SSD Upgrade - YouTube
macbook pro - Can I upgrade RAM on late 2013 retina Mac Book Pro? - Ask Different
How to Upgrade the SSD in a 15-inch MacBook Pro w/ Retina display (2012–2013) MacBookPro10,1 & 10,2 - YouTube
MacBook Pro "Core i7" 2.3 15" Late 2013 (DG) Specs (Retina Late 2013 15", ME294LL/A, MacBookPro11,3, A1398, 2745): EveryMac.com
mac - Can I upgrade the memory on late 2013 Retina MacBook Pro? - Ask Different
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
Sold - Late 2013 15" MacBook Pro Retina - $895 | Denver Mac Repair
2013 Apple MacBook Pro Core i7 2.8 15" Dual Graphics Retina Early 2013 - ME698LL/A - MacBookPro10,1 - A1398
A-Tech for Apple 16GB Kit (2x 8GB) DDR3 1600MHz PC3-12800 204-pin SODIMM MacBook Pro (Mid 2012 13”/15”), iMac (Late 2012, Early/Late 2013, Late 2014, Mid 2015, 21.5”/27”, Retina 5K) Memory RAM Upgrade at Amazon.com
Sold - 15" MacBook Pro Retina Late 2013 // $895 - Boulder Mac Repair