How to Upgrade MacBook Pro RAM (2009, 2010, 2011, 2012): EveryMac.com
Amazon.com: Apple MacBook Pro 13-inch MD313LL/A (4GB RAM, 500GB HD, macOS 10.13) (Renewed) : Electronics
MacBook Pro Upgrade Guide
How To: MacBook Pro Late 2011 Memory Upgrade - 16GB (2 X 8GB) : 6 Steps - Instructables
A-Tech 16GB (2x8GB) RAM for Apple MacBook Pro (Early/Late 2011), iMac (Mid 2010 27 inch 4-Core, Mid 2011 21.5/27 inch), Mac Mini (Mid 2011) | DDR3 1333MHz PC3-10600 204-Pin SODIMM Memory Upgrade Kit at Amazon.com
Apple MacBook Pro 13-Inch The MacBook Pro "Core i7" 2.7 13-Inch (Early 2011/Thunderbolt) features a 32 nm "Sandy Bridge" 2.7 GHz Intel
Timetec 16GB KIT(2x8GB) Compatible for Apple DDR3L 1600MHz for Mac Book Pro (Early/Late 2011,Mid 2012), iMac(Mid 2011,Late 2012,Early/Late 2013,Late 2014,Mid 2015), Mac Mini(Mid 2011,Late 2012) MAC RAM at Amazon.com
Macbook Pro 17-inch 2.5GHz i7 - 17" Macbook Pro
MacBook Pro "Core i7" 2.8 13" Late 2011 Specs (Late 2011 13", MD314LL/A, MacBookPro8,1, A1278, 2555*): EveryMac.com
Finally did it! Upgraded my Late 2011 MBP with an SSD and 16GB of RAM and it runs like new! Couldn't be happier : r/mac
Timetec 16GB KIT(2x8GB) Compatible for Apple DDR3L 1600MHz for Mac Book Pro (Early/Late 2011,Mid 2012), iMac(Mid 2011,Late 2012,Early/Late 2013,Late 2014,Mid 2015), Mac Mini(Mid 2011,Late 2012) MAC RAM at Amazon.com
SOLVED: Best RAM for MacBook Pro Late 2011? - MacBook Pro 15" Unibody Late 2011 - iFixit
macos - What is the maximum amount of RAM a 2011 MacBook Pro can utilize? - Ask Different
Refurbished 2015 Apple MacBook Pro Quad Core i7 2.8 15" Dual Graphics 16GB RAM 2TB SSD MJLU2LL/A A1398
How To: MacBook Pro Late 2011 Memory Upgrade - 16GB (2 X 8GB) : 6 Steps - Instructables
MacBook Pro 13" (Late 2011) 1600MHz Ram - Apple Community
Display Quality & Peripherals - Apple 15-inch MacBook Pro (Late 2011) Review
Upgrading the Late 2011 MacBook Pro to 16 GB of RAM! - YouTube