Macbook Pro RAM Upgrade Kit 8GB 2 x 4GB 2011 2012 A1278 A1286 13 15" 10600s DDR3 836905536579 | eBay
A-Tech 16GB (2x8GB) RAM for Apple MacBook Pro (Early/Late 2011), iMac (Mid 2010 27 inch 4-Core, Mid 2011 21.5/27 inch), Mac Mini (Mid 2011) | DDR3 1333MHz PC3-10600 204-Pin SODIMM Memory Upgrade Kit at Amazon.com
2009 Macbook Pro 15" A1286 RAM Upgrade - YouTube
Apple MacBook Pro A1286 Mid 2010 Core i7-620M 2.66 GHz 8 GB RAM 500 GB HDD 15.4" | eBay
How to Upgrade MacBook Pro RAM (2009, 2010, 2011, 2012): EveryMac.com