How To: MacBook Pro Late 2011 Memory Upgrade - 16GB (2 X 8GB) : 6 Steps - Instructables
OFFTEK 8GB Replacement Memory RAM Upgrade for Apple MacBook Pro 2.3GHz Intel Core i5 - (13-inch) (DDR3) (Early-2011) (DDR3-10600) Laptop Memory: Amazon.co.uk: Computers & Accessories
MacBook Pro "Core i5" 2.3 13" Early 2011 Specs (Early 2011 13", MC700LL/A, MacBookPro8,1, A1278, 2419*): EveryMac.com
Upgrading the Late 2011 MacBook Pro to 16 GB of RAM! - YouTube
MacBook Pro: How to remove or install memory - Apple Support
How to Upgrade MacBook Pro RAM (2009, 2010, 2011, 2012): EveryMac.com
MacBook Pro - Wikipedia
Early 2011 Macbook Pro Upgrades | MacRumors Forums
MacBook Pro 13" Unibody Early 2011 RAM Replacement - iFixit Repair Guide
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
How to upgrade the RAM on your 13-inch MacBook Pro
macos - What is the maximum amount of RAM a 2011 MacBook Pro can utilize? - Ask Different
How to Upgrade MacBook Pro RAM (2009, 2010, 2011, 2012): EveryMac.com
16GB MacBook Pro RAM Upgrade (2011) - YouTube
Apple MacBook Pro 13 (Early 2011) review: Apple MacBook Pro 13 (Early 2011) - CNET
A1286 8GB RAM - Memory (PC3-10600) for MacBook Pro 15" 13" A1278 , MacBook Pro 17" (Early 2011-Late 2011)
MacBook Pro (13-inch, Early 2011) - Technical Specifications
MacBook Pro 15" Unibody Early 2011 Teardown - iFixit
Apple MacBook Pro Late 2011 8GB Memory & SSD Upgrade - YouTube