California (Southern) University. National Center for Educational Media. (1969). Index to overhead transparencies. R.R. Bowler.
Lua i Stíl Chicago (17ú heag.)California (Southern) University. National Center for Educational Media. Index to Overhead Transparencies. New York: R.R. Bowler, 1969.
Lua MLA (9ú heag.)California (Southern) University. National Center for Educational Media. Index to Overhead Transparencies. R.R. Bowler, 1969.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.