BibTeX-Format:
@incollection{ title = {{C}hild-external and -internal factors in bilingual code-switching: {S}panish, {I}talian, {F}rench and {G}erman}, publisher = {Lang}, pages = {191-209}, address = {Frankfurt am Main}, typ = {incollection}, author = {Patuto, Marisa, Malin Hager, Laia Arnaus Gil, Nadine Eichler, Veronika Jansen, Anika Schmeißer