BibTeX-Format:
@inbook{ year = {2009}, pages = {199-220}, chapter = {12}, publisher = {Cambridge University Press}, address = {Cambridge}, typ = {inbook}, booktitle = {{T}he {H}andbook of {C}ode-switching}, title = {{L}anguage mixing in bilingual children: code-switching?}, bookauthor = {Barbara E. Bullock