How to Upgrade MacBook Pro RAM (2009, 2010, 2011, 2012): EveryMac.com
Does the mid-2012 13 MacBook Pro have an M.2 slot that I can use for an Intel Optane memory upgrade? - Quora
7 Best RAMs for MacBook Pro in 2023
MacBook Pro: How to remove or install memory - Apple Support
A-Tech for Apple 6GB Kit (1x2GB + 1x4GB) DDR2 667MHz PC2-5300 200-pin SODIMM for MacBook (Late 2007, Early 2008, Early 2009), MacBook Pro (Mid 2007, Early 2008), iMac (Mid 2007) - Memory RAM Upgrade at Amazon.com
How to Upgrade MacBook Pro RAM (2009, 2010, 2011, 2012): EveryMac.com
8GB (2X4GB) RAM Memory for Apple MacBook Pro "Core i5" 2.4 13.3" MD313LL/A A1278 | eBay
Amazon.com: Odyson - Logic Board 2.5GHz Core i5 (i5-3210M) Replacement for MacBook Pro 13" Unibody A1278 (Mid 2012) : Electronics
Macbook Pro SSD Drive Upgrade 128GB Sierra 10.12 2.5 2011 2012 A1278 solid state 619659084141 | eBay