Kirby, T. J., Carpenter, M. F., Knott, T. A., & Brinkerhoff, R. M. (1930). Pupil activity English series. Harcourt, Brace.
Lua i Stíl Chicago (17ú heag.)Kirby, Thomas Joseph, Millington Farwell Carpenter, Thomas A. Knott, agus R. M. Brinkerhoff. Pupil Activity English Series. New York ; Chicago: Harcourt, Brace, 1930.
Lua MLA (8ú heag.)Kirby, Thomas Joseph, et al. Pupil Activity English Series. Harcourt, Brace, 1930.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.