SpringerLink (Online service), Gulzow, I., & Gagarnia, N. The acquisition of verbs and their grammar: The effect of particular languages.
Chicago-referens (17:e uppl.)SpringerLink (Online service), Insa Gulzow, och Natalia Gagarnia. The Acquisition of Verbs and Their Grammar: The Effect of Particular Languages.
MLA-referens (8:e uppl.)SpringerLink (Online service), et al. The Acquisition of Verbs and Their Grammar: The Effect of Particular Languages.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.