MacBook Pro 15" Unibody Early 2011 RAM Replacement - iFixit Repair Guide
How To Upgrade RAM On MacBook Air? - YouTube
Cómo ampliar la RAM en MacBook Pro, iMac y otros | AVG
MacBook Air 13" Mid 2011 Teardown - iFixit
MacBook Air 13 2011 i5 1.7GHz - Refurbished Smart Generation
MacBook Pro RAM Upgrades (Non-Retina) - OWC
Apple MacBook Air 11.6" Mid-2011 (128GB SSD, i5 2nd, 4GB RAM) Laptop Great Shape 46708925368 | eBay
Apple MacBook RAM, Airport (Wireless) cards, Hard drives and SSDS upgrades
Adamanta 16GB (2x8GB) Memory Upgrade Compatible for Apple Mid 2010, Early 2011, Mid 2011, Late 2011 iMac, MacBook Pro, Mac Mini DDR3 1333Mhz PC3-10600 SODIMM 2Rx8 CL9 1.5v Module RAM at Amazon.com