@mastersthesis {5546,
	title = {Construct validation of teacher portfolio assessment},
	year = {2005},
	pages = {168},
	school = {Universiteit Utrecht},
	keywords = {construct validity, portfolio assessment},
	url = {http://igitur-archive.library.uu.nl/dissertations/2006-0103-200145/full.pdf},
	author = {Van der Schaaf, M.}
}
