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
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
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 2014-07 - Notebookcheck.net External Reviews
SOLVED: Can RAM be upgraded? - MacBook Pro 13" Retina Display Mid 2014 - iFixit
15" MacBook Pro Retina A1398 - Logic Board Mid 2014
Review: Apple's mid-2014 13-inch MacBook Pro with Retina display | AppleInsider
MacBook Pro (Retina, 13-inch, Mid 2014) - Technical Specifications
MacBook Pro (Retina, 13-inch, Early 2015) Upgrade to NVMe M.2 SSD - YouTube
Retina MacBook Pro review (15in, 2.2GHz, mid 2014) | Macworld
MacBook Pro Retina 13 and 15-inch Late 2013 - Mid 2014 SSD upgrade - Flexx memory
timetec 32gb kit(4x8gb) compatible for apple ddr3l 1600mhz pc3l-12800 cl11 for imac (mid 2011, late 2012, late 2013, late 2014 retina 5k, mid 2015 retina 5k) sodimm memory module mac ram upgrade - Walmart.com