Dell Latitude E6420 RAM Replacement - iFixit Repair Guide
A-Tech 2GB Memory RAM for Dell Latitude E6420 - DDR3L 1600MHz PC3-12800 Non ECC SO-DIMM 1Rx16 1.35V - Single Laptop & Notebook Upgrade Module ( Replacement for SNPTX3GVC/2G) at Amazon.com
OFFTEK 4GB Replacement Memory RAM Upgrade for Dell Latitude E6420 (DDR3-10600) Laptop Memory at Amazon.com
OFFTEK 4GB Replacement Memory RAM Upgrade for Dell Latitude E6420 (DDR3-10600) Laptop Memory at Amazon.com
How to Install Laptop Memory | How to Upgrade Laptop RAM | Dell Latitude E6420 | Quick & Easy!!! - YouTube
Dell Latitude E6420 review: Dell Latitude E6420 - CNET