Johnson, W. H., & Moffett, H. Y. (1937). Practice leaves "A". Harper & Brothers Publishers.
Lua i Stíl Chicago (17ú heag.)Johnson, Willoughby H., agus H. Y. Moffett. Practice Leaves "A". New York ; London: Harper & Brothers Publishers, 1937.
Lua MLA (8ú heag.)Johnson, Willoughby H., agus H. Y. Moffett. Practice Leaves "A". Harper & Brothers Publishers, 1937.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.