Campbell, H. (1880). Unto the third and fourth generation: A study. Fords, Howard & Hulbert.
Lua i Stíl Chicago (17ú heag.)Campbell, Helen. Unto the Third and Fourth Generation: A Study. New York: Fords, Howard & Hulbert, 1880.
Lua MLA (8ú heag.)Campbell, Helen. Unto the Third and Fourth Generation: A Study. Fords, Howard & Hulbert, 1880.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.