How to upgrade the RAM on your 13-inch MacBook Pro
CMS 8GB (2X4GB) DDR3 8500 1066MHZ Non ECC SODIMM Memory Ram Upgrade Compatible with Apple® MacBook Pro Core I5 2.53 15" Mid-2010 Ddr3 - A35 at Amazon.com
MacBook Pro 15" Unibody Late 2008 and Early 2009 RAM Replacement - iFixit Repair Guide
Apple MacBook Pro Retina 15.4" Laptop with Touch Bar - 2.3GHz 8-Core i9 - 16GB RAM - 512GB SSD - AMD Radeon Pro 560X (4GB) - (2019) - Space Gray - Best Deal in Town
MacBook Pro: How to remove or install memory - Apple Support