Houghton, F. (1911). First lessons in English for foreigners in evening schools. American Book Co.
Lua i Stíl Chicago (17ú heag.)Houghton, Frederick. First Lessons in English for Foreigners in Evening Schools. New York, Cincinati [etc.]: American Book Co, 1911.
Lua MLA (8ú heag.)Houghton, Frederick. First Lessons in English for Foreigners in Evening Schools. American Book Co, 1911.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.