Koru, M. H., & Shultz, O. M. (1944). Tap, tap, zip. University of Florida Project in Applied Economics, Florida Curriculum Laboratory, College of Education.
Lua i Stíl Chicago (17ú heag.)Koru, Mary H., agus Orlo M. Shultz. Tap, Tap, Zip. Gainesville, Fla.: University of Florida Project in Applied Economics, Florida Curriculum Laboratory, College of Education, 1944.
Lua MLA (8ú heag.)Koru, Mary H., agus Orlo M. Shultz. Tap, Tap, Zip. University of Florida Project in Applied Economics, Florida Curriculum Laboratory, College of Education, 1944.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.