How to Upgrade MacBook Pro RAM (2009, 2010, 2011, 2012): EveryMac.com
Apple Macbook Pro Laptop 15" 2.3Ghz - 3.3Ghz Core i7 - Up to 16GB & 2TB SSHD
A-Tech 16GB Kit (2x8GB) RAM for Apple MacBook Pro (Mid 2012), iMac (Late 2012, Early/Late 2013, Late 2014, Mid 2015), Mac Mini (Late 2012) | DDR3 1600MHz PC3-12800 SODIMM 204-Pin Memory Upgrade at Amazon.com
MacBook Pro MB985LL A | Core 2 Duo 2.66 GHz | 15 Inch | Mid 2009 - Techable
15-inch MacBook Pro Mid 2009 Memory Installation Video - YouTube