I am currently playing a haydn sonata and trust me it is just easier to go by the book. His complete sonatas are usually in 2 books, both books are only 15 or so dollars. you would probably spend more money on paper and ink if you tried to print it out. Here is another thing about sheet music. If you teach or ever plan on teaching by books that are complete of something, not just single pieces. It is easier to just go look at what you have instead of going to some store and taking a look at what they have. Besides your students will appreciate the quicker response.
boliver