How to Upgrade MacBook Pro RAM (2009, 2010, 2011, 2012): EveryMac.com
How to upgrade memory on your mid-2012 or earlier Mac Pro | iMore
My mid-2012 13" MacBook Pro upgrade project - Monterey, 16GB RAM, SSD, new battery : r/MacOS
Macbook Pro 2012 RAM Upgrade - 4GB(2x2GB) to 8GB(2x4GB) - YouTube
Adamanta 16GB (2x8GB) Apple Memory Upgrade DDR3L 1600MHz SODIMM Compatible for iMac (Mid 2011, Late 2012, Early/Late 2013, Late 2014, Mid 2015), MacBook Pro (Early/Late 2011, Mid 2012), Mac Mini at Amazon.com
4 Best RAM Upgrades for Old MacBook Pro (Reviews)
4GB Memory Module for Apple MacBook Pro 13-inch (Mid 2012) 1600MHz DDR3 (PC3-12800) (PARTS-QUICK Brand) at Amazon.com
MacBook Pro: How to remove or install memory - Apple Support
How to upgrade MacBook Pro RAM (2009-2012) - YouTube
Upgrade Your Macbook Pro (SSD Upgrade, RAM Upgrade, Optical Drive Bay Adapter) - YouTube