MacBook Unibody Model A1342 RAM Replacement - iFixit Repair Guide
OWC 16GB (2x8GB) ram Upgrade PC3-12800 DDR3L 1600MHz sodimm 204 Pin CL11 Memory Upgrade Kit Compatible with Late iMac, Mac Mini, and MacBook Pro Computer at Amazon.com
4GB MC207LL/A A1342 204-Pin DDR3 So-dimm for MacBook | Memory for Apple Woman Owned Small Business. Ready to Ship!