@inbook {2008,
	title = {Betoverende baksteenvariaties. Laatromaanse architectuur},
	booktitle = {De Groninger cultuurschat. De kerken van 1000 tot 1800},
	year = {2008},
	pages = {18-45},
	publisher = {Philips Elchers-Van Gorcum},
	organization = {Philips Elchers-Van Gorcum},
	address = {Groningen-Assen},
	isbn = {978-90-232-4482-0},
	author = {Ploeg, Kees van der},
	editor = {Kroesen, J.E.A. and Steensma, Regnerus}
}
