How-To: Boost your Mac's speed and prolong its useful life with easy RAM upgrades - 9to5Mac
How To Upgrade RAM On MacBook Air? - YouTube
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
macbook pro - Can I upgrade RAM on late 2013 retina Mac Book Pro? - Ask Different
Can You Upgrade the RAM in Your Mac?
Reemplazo de RAM de MacBook Pro 15" Unibody de mediados de 2012 - Guía de reparación iFixit
How to Upgrade the RAM in Your MacBook Pro
MacBook Pro 17" Unibody RAM Replacement - iFixit Repair Guide