At least in Europe it seems widely be accepted that you may quote any literar work as long as you keep it short and refer to original source. To those handwritten notes there are two categories in my understanding. Are you just writing down what you heard in a presentation or are you making personally thought notes that raise the bar to individual piece of literar work? To be able to quote to those handwritten notes in correct way you should be able to refer to the originator of that note, Brother Smith stated this in his speech on.... Brother Warren states in his notes that..... . By default those notes are equally copyrighted but obviously the originator do not need to be the one writing them down.
CP