@book{89155,
	author = {Vletter, A. C. C. de, and Wildschut, George,},
	title = {De ridders van den halven toren},
	publisher = {Project Gutenberg,},
	year = {2015},
	address = {Salt Lake City, UT :},
	note = {Release date is 2015-02-20},
	url = {https://www.gutenberg.org/ebooks/48316}
}