Should I buy DDR3 or DDR3L RAM for late 2012 MacBook pro 13 inch? I have a MacBook Pro 13", late 2012 model.

This MacBook has 2x2gb 1600MHz DDR3 RAM. I am planning to upgrade it to 8GB of RAM.

I am wondering, should I buy DDR3 or DDR3L type of RAM?
Apple has a RAM upgrade guide located here. For your computer(MBP 13" mid-2012),  it provides this information: