van Belle, William. 1989. 'Want', 'omdat' en 'aangezien'. Leuvense Bijdragen 78. 435–456.
@article{kortmannadverbial-vanBelle1989,
author = {van Belle, William},
journal = {Leuvense Bijdragen},
pages = {435–456},
title = {'Want', 'omdat' en 'aangezien'},
volume = {78},
year = {1989}
}