Smith, N. B., & Schwieg, R. C. (1938). Gliders and Airplanes: Supplementary pamphlet no. 2-1-2. Silver Burdett Co..
Lua i Stíl Chicago (17ú heag.)Smith, Nila Banton, agus Rhoda C. Schwieg. Gliders and Airplanes: Supplementary Pamphlet No. 2-1-2. [S.l.]: Silver Burdett Co., 1938.
Lua MLA (8ú heag.)Smith, Nila Banton, agus Rhoda C. Schwieg. Gliders and Airplanes: Supplementary Pamphlet No. 2-1-2. Silver Burdett Co., 1938.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.