American Library Association & Article 19 (Organization). (1991). Information freedom and censorship: World report 1991. American Library Association.
Chicago-referens (17:e uppl.)American Library Association och Article 19 (Organization). Information Freedom and Censorship: World Report 1991. Chicago: American Library Association, 1991.
MLA-referens (9:e uppl.)American Library Association och Article 19 (Organization). Information Freedom and Censorship: World Report 1991. American Library Association, 1991.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.