Clemens, S. L., & Hill, H. L. (1967). Mark Twain's letters to his publishers, 1867-1894. University of California Press.
Lua i Stíl Chicago (17ú heag.)Clemens, Samuel Langhorne, agus Hamlin Lewis Hill. Mark Twain's Letters to His Publishers, 1867-1894. Berkeley: University of California Press, 1967.
Lua MLA (9ú heag.)Clemens, Samuel Langhorne, agus Hamlin Lewis Hill. Mark Twain's Letters to His Publishers, 1867-1894. University of California Press, 1967.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.