Karl, C. A. (1990). Teacher observation in selected secondary schools of the Archdiocese of Chicago.
Chicago-referens (17:e uppl.)Karl, Catherine A. Teacher Observation in Selected Secondary Schools of the Archdiocese of Chicago. 1990.
MLA-referens (8:e uppl.)Karl, Catherine A. Teacher Observation in Selected Secondary Schools of the Archdiocese of Chicago. 1990.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.