Macbook Pro RAM Upgrade Kit- 8GB (2 x 4GB) for 2011 2012 A1278 A1286 13 15" inch 12300513760 | eBay
MacBook Pro 13" Unibody Late 2011 RAM Replacement - iFixit Repair Guide
MacBook Pro: How to remove or install memory - Apple Support
APPLE MACBOOK PRO 15" PRE-RETINA ULTRA UPGRADE 8GB RAM 1TB HYBRID SSD WARRANTY | eBay
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 RAM Upgrade Kit 8GB 2 x 4GB 2011 2012 A1278 A1286 13 15" 10600s DDR3 836905536579 | eBay
Amazon.in: Buy 16GB Kit 2 x 8 GB RAM Memory Upgrade Certified for Apple MacBook Pro 15-inch Core i7 2.0GHz Early 2011 MC721LL A DDR3 Model Rank 2 Memory Online at Low
MacBook Pro 15" Unibody Early 2011 Logic Board Replacement - iFixit Repair Guide
MacBook Pro 15" Unibody Early 2011 RAM Replacement - iFixit Repair Guide
How to Upgrade RAM In A MacBook Pro (15-Inch Early 2011) - YouTube
How to Upgrade MacBook Pro RAM (2009, 2010, 2011, 2012): EveryMac.com
MacBook Pro: How to remove or install memory - Apple Support
Display Quality & Peripherals - Apple 15-inch MacBook Pro (Late 2011) Review
MacBook Pro 15" Unibody Early 2011 RAM Replacement - iFixit Repair Guide
MacBook Pro 15" Unibody Late 2011 RAM Replacement - iFixit Repair Guide
MacBook Pro 13" Unibody Late 2011 RAM Replacement - iFixit Repair Guide