MacBook Pro Retina 15-inch Late 2013 A1398 16GB RAM 1TB SSD | eBay
mac - Can I upgrade the memory on late 2013 Retina MacBook Pro? - Ask Different
MacBook Pro Retina 2013 teardown: Tough fix, good parts - CNET
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 13" Retina Display Late 2013 SSD Replacement - iFixit Repair Guide
macbook pro - Can I upgrade RAM on late 2013 retina Mac Book Pro? - Ask Different
The Super MacBook Pro Upgrade (1TB RAID SSD Upgrade + RAM Upgrade 2013) - YouTube