Nash, R. (1973). Classrooms observed: The teacher's perception and the pupil's performance. Routledge & K. Paul.
Lua i Stíl Chicago (17ú heag.)Nash, Roy. Classrooms Observed: The Teacher's Perception and the Pupil's Performance. London ; Boston: Routledge & K. Paul, 1973.
Lua MLA (8ú heag.)Nash, Roy. Classrooms Observed: The Teacher's Perception and the Pupil's Performance. Routledge & K. Paul, 1973.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.