Smith, R. M. (1969). Teacher dignosis of educational difficulties. Charles E.Merrill.
Lua i Stíl Chicago (17ú heag.)Smith, Robert M. Teacher Dignosis of Educational Difficulties. Columbus: Charles E.Merrill, 1969.
Lua MLA (9ú heag.)Smith, Robert M. Teacher Dignosis of Educational Difficulties. Charles E.Merrill, 1969.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.