Willis, M. R. (1999). Dealing with difficult people in the library. American Library Association.
Citazione stile Chigago Style (17a edizione)Willis, Mark R. Dealing with Difficult People in the Library. Chicago: American Library Association, 1999.
Citatione MLA (9a ed.)Willis, Mark R. Dealing with Difficult People in the Library. American Library Association, 1999.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.