Memory/ RAM Upgrades For Apple MacBook Pro 2011 from OWC
Apple 15-inch MacBook Pro (Late 2011) Review
upgrade - 32gb of RAM on a 2011 or 2012 15/17-inch MacBook Pro using Crucial's 16gb single DIMMs - Ask Different
How to upgrade your 2011 or 2012 Macbook Pro RAM (with Step-by-Step photos) – Amanda Xi
How to Upgrade MacBook Pro RAM (2009, 2010, 2011, 2012): EveryMac.com
MacBook Pro: How to remove or install memory - Apple Support
Early 2011 MacBook Pro 15" 16 GB RAM & Hard Drive Upgrade - YouTube
OWC 2.0GB PC10600 DDR3 1333MHz SO-DIMM Compatible with 2011 MacBook Pro, Mid 2010/2011 21.5" & 27" iMac Models, 2011 Mac Mini (OWC1333DDR3S2GB) at Amazon.com
How to Upgrade RAM in MacBook Pro 17" 2011 16GB Install Tutorial - YouTube
Amazon.com: Timetec 16GB KIT(2x8GB) Compatible for Apple DDR3 1333MHz PC3-10600 CL9 for Mac Book Pro (Early/Late 2011 13/15/17 inch), iMac(Mid 2010, Mid/Late 2011 21.5/27 inch), Mac Mini(Mid 2011) MAC RAM Upgrade :
MacBook Pro 15" Unibody Early 2011 RAM Replacement - iFixit Repair Guide
Apple MacBook Pro 13-inch (2011) | Laptop Mag
8GB -2x4GB Memory Ram Upgrade Apple MacBookPro-8.1 Early 2011 13" Core i7 2.7GHz | eBay