(2018). Measures of Language Proficiency in Censuses and Surveys A Comparative Analysis and Assessment / by Pádraig Ó Riagáin. [electronic resource].
Chicago-referens (17:e uppl.)Measures of Language Proficiency in Censuses and Surveys A Comparative Analysis and Assessment / by Pádraig Ó Riagáin. [electronic Resource]. 2018.
MLA-referens (9:e uppl.)Measures of Language Proficiency in Censuses and Surveys A Comparative Analysis and Assessment / by Pádraig Ó Riagáin. [electronic Resource]. 2018.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.