8GB PC3-10600 RAM for Apple MacBook Pro Late 2011 - 15 Inch MD322LL/A - MD322xx/A
Apple MacBook Pro (13-inch, Early 2011) 2.3GHz Intel Core i5, 6GB RAM, 128GB SSD | eBay
CMS 8GB (2X4GB) DDR3 10600 1333MHZ NON ECC SODIMM Memory Ram Upgrade Compatible with Apple® Macbook Pro "Core I7" 2.2 15" Early 2011 - A29 System Specific Memory - Newegg.com
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
Upgrading RAM on a First Generation MacBook Air - YouTube
8GB RAM Upgrade for 2011 MacBook Pro & Mac Mini Core i5 & i7 – $34 | OSXDaily
16GB MacBook Pro RAM Upgrade (2011/2012/2013) - YouTube
Apple MacBook Pro 13.3" Intel Core i5 4GB RAM 320GB Hard Drive (MC700LL/A) Early 2011 (Certified Refurbished) Silver A1278 - Best Buy
Memory/ RAM Upgrades For Apple MacBook Pro 2011 from OWC