Metcalf, R. C., & Bright, O. T. (1894). Language lessons. American Book Company.
Lua i Stíl Chicago (17ú heag.)Metcalf, Robert C., agus Orville T. Bright. Language Lessons. New York ; Cincinnati [etc.]: American Book Company, 1894.
Lua MLA (8ú heag.)Metcalf, Robert C., agus Orville T. Bright. Language Lessons. American Book Company, 1894.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.