L. E. Harris, Canadian Copyright Law, 2013 ([Internet, 2017-08-28](https://books.google.ch/books?id=DfheAQAAQBAJ&pg=PT175&lpg=PT175&dq=%22exercise+copyright%22&source=bl&ots=esGXMU0umr&sig=EIEA4O19Ax1tvb95Mtzp8O2wc8M&hl=de&sa=X&ved=0ahUKEwjRvdCyk_rVAhXPERQKHT4IAo84ChDoAQglMAA#v=onepage&q=%22exercise%20copyright%22&f=false))