Pichl, Walter J. 1973. Sherbro. In Kropp-Dakubu, M. E. (ed.), West African Langauge Data Sheets, 223–229. West African Linguistics Society.
@incollection{1321_bun, author = {Pichl, Walter J.}, booktitle = {West African Langauge Data Sheets}, editor = {Kropp-Dakubu, M. E.}, pages = {223–229}, publisher = {West African Linguistics Society}, title = {Sherbro}, volume = {2}, year = {1973} }