Kaplan, J. (1967). Mark Twain: A profile. Hill and Wang.
Lua i Stíl Chicago (17ú heag.)Kaplan, Justin. Mark Twain: A Profile. New York: Hill and Wang, 1967.
Lua MLA (9ú heag.)Kaplan, Justin. Mark Twain: A Profile. Hill and Wang, 1967.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.