Vos, R. (1994). Eurotra grammar: Wh-questions ; a comparative study of Dutch, English, Portuguese and Spanish. Ed. Dell'Orso.
Chicago-Zitierstil (17. Ausg.)Vos, Riet. Eurotra Grammar: Wh-questions ; a Comparative Study of Dutch, English, Portuguese and Spanish. Alessandria: Ed. Dell'Orso, 1994.
MLA-Zitierstil (9. Ausg.)Vos, Riet. Eurotra Grammar: Wh-questions ; a Comparative Study of Dutch, English, Portuguese and Spanish. Ed. Dell'Orso, 1994.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.