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
How to Upgrade MacBook Pro RAM (2009, 2010, 2011, 2012): EveryMac.com
Apple MacBook Pro A1278 Early-2011 13" Intel i5 @ 2.3GHz 8GB RAM 500GB HDD *READ | eBay
Apple Macbook Pro 13 inch Early 2011 2.3 GHz Intel Core i5 4GB RAM 320GB SATA | eBay
Apple MacBook Pro (13-inch Early 2011) 2.3 GHz Intel core i5 500GB HDD 16GB RAM | eBay
Apple MacBook Pro 13 (Early 2011) review: Apple MacBook Pro 13 (Early 2011) - CNET
32GB (4X8GB) RAM Memory 4 Apple MacBook Pro "Core i5" 2.3 13" Early 2011 C12 849005085618 | eBay
APPLE MACBOOK PRO (13-INCH, EARLY 2011) Intel i5-2415M 2.30GHz 4GB RAM 320GB HDD | eBay
MacBook Pro 13" Unibody Early 2011 RAM Replacement - iFixit Repair Guide
MacBook Pro 13" Unibody Early 2011 RAM Replacement - iFixit Repair Guide
Sold: 13-inch MacBook Pro Early-2011 // $650 - Denver Mac Repair
Macbook PRO 13-inch A1278, Early 2011, 500GB SSD, 16GB RAM, OSX High Sierra | eBay
MacBook Pro 13" Unibody Early 2011 RAM Replacement - iFixit Repair Guide
16GB MacBook Pro RAM Upgrade (2011) - YouTube
MacBook Pro 13" Unibody Early 2011 RAM Replacement - iFixit Repair Guide
8GB Upgrade for a Apple MacBook Pro (13-inch, Early 2011) System (DDR3 PC3-10600, Non-ECC, ) at Amazon.com
Apple MacBook Pro 13 inch 2011-10 MD313LL/A - Notebookcheck.net External Reviews
MacBook Pro 13" Unibody Early 2011 Repair - iFixit
MacBook Pro 13" Unibody Early 2011 RAM Replacement - iFixit Repair Guide
Can early-2011 MacBook Pro 13" handle 1600 RAM? | MacRumors Forums