Garfunkel, F. (1967). Observation of teachers and teaching: Strategies and applications. Office of Education.
Lua i Stíl Chicago (17ú heag.)Garfunkel, Frank. Observation of Teachers and Teaching: Strategies and Applications. Washington: Office of Education, 1967.
Lua MLA (9ú heag.)Garfunkel, Frank. Observation of Teachers and Teaching: Strategies and Applications. Office of Education, 1967.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.