IRS Publication 526 – Charitable Deductions http://www.irs.gov/pub/irs-pdf/p526.pdf
IRS Publication 561 – Determining Value of Donated Property http://www.irs.gov/pub/irs-pdf/p561.pdf
Donations of Autos, Boats, and Planes http://www.irs.gov/newsroom/article/0,,id=131660,00.html