Cita APA (7th ed.)

Twain, M., & Hill, H. (1967). Mark Twain's letters to his publishers, 1867-1894. University of California Press.

Cita Chicago (17th ed.)

Twain, Mark, i Hamlin Hill. Mark Twain's Letters to His Publishers, 1867-1894. Berkeley: University of California Press, 1967.

Cita MLA (8th ed.)

Twain, Mark, i Hamlin Hill. Mark Twain's Letters to His Publishers, 1867-1894. University of California Press, 1967.