Amazon.com: Timetec 8GB KIT(2x4GB) 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 : Electronics
MacBook Pro 13" Unibody Late 2011 RAM Replacement - iFixit Repair Guide
8GB 2x4GB DDR3 1333 Memory Ram For Apple MacBook Pro 13" 15" 17-inch Late 2011 | eBay
16GB Kit 2X8GB DDR3 Memory for Apple MacBook Pro 13-inch Core i5 2.4GHz Late 2011 MD313LL/A A1278 SODIMM RAM (PARTS-QUICK Brand) at Amazon.com
Apple MacBook Pro 13.3" Intel Core i5 4GB RAM 500GB Hard Drive (MD313LL/A) Late 2011 (Certified Refurbished) Silver A1278 - Best Buy
How To: Install RAM in Macbook Pro (Unibody - 2009 to 2011) - YouTube
Macbook Pro RAM 4GB (2 x 2GB) 2009 2010 2011 2012 A1278 A1286 13 15" DDR3 10600s | eBay
16GB (2X8GB) SODIMM RAM Memory for Apple MacBook Pro Core i5 2.3 13" Early 2011 DDR3-10600 1333Mhz by Xtremeram at Amazon.com
upgrade - 32gb of RAM on a 2011 or 2012 15/17-inch MacBook Pro using Crucial's 16gb single DIMMs - Ask Different
macos - What is the maximum amount of RAM a 2011 MacBook Pro can utilize? - Ask Different
Apple MacBook Pro Early 2011 Crucial Memory Upgrade - YouTube
MacBook Pro 15" Unibody Early 2011 RAM Replacement - iFixit Repair Guide