Beethoven, Piano Sonata No. 14 in C-sharp minor, Op. 27 No. 2 "Moonlight": II. Allegretto
The recording I specified on your handout (Wilhelm Kempff on Deutsche Grammophon records) has gotten pulled from YouTube, so tube-heads can use this live performance by Daniel Barenboim instead.
Here are links to the recording I like (the Wilhelm Kempff.) You can use this as well.
Looking at the sheet music is not necessary for this project. But, if you are curious, the score is available for free at IMSLP.