yellow spots on my citrus tree

I noticed these spots on my tree after my neighbor showed me his. It was in pretty bad shape. My young tree has about 8 leaves that are affected and would like to nip this in the bud. Please help

Thanks

underneath the leaf

These links might help you identify the problem, but it looks like greasy spot.
http://aggie-horticulture.tamu.edu/citrus/l2315.htm
http://aggie-horticulture.tamu.edu/citrus/l2328.htm

This link is from Florida, but it has good photos.
http://edis.ifas.ufl.edu/hs141

I believe you're right. Before the artic blast I drenched it with pesticide and it didn't help so I knew it wasn't bugs.

Thank you so much for the info.