8GB Kit (4GBx2) Upgrade for a Apple MacBook Pro 2.0GHz Intel Core i7 (15-inch DDR3) Early-2011 System (DDR3 PC3-10600, Non-ECC, ) at Amazon.com
How to upgrade your 2011 or 2012 Macbook Pro RAM (with Step-by-Step photos) – Amanda Xi
RAM'ible (MacBook Pro RAM Upgrade) : 6 Steps - Instructables
OWC 16GB (2x8GB) ram Upgrade PC3-12800 DDR3L 1600MHz sodimm 204 Pin CL11 Memory Upgrade Kit Compatible with Late iMac, Mac Mini, and MacBook Pro Computer at Amazon.com
Memory/ RAM Upgrades For Apple MacBook Pro 2011 from OWC
Apple MacBook Pro (13-inch, Early 2011) | Memory RAM & SSD Upgrades | Crucial.com