Clemens, C. (1931). My father Mark Twain: Illustrated from family photographs with hitherto unpublished letters of Mark Twain / by Clara Clemens (5. print.). Harper.

Clemens, Clara. My Father Mark Twain: Illustrated from Family Photographs with Hitherto Unpublished Letters of Mark Twain / by Clara Clemens. 5. print. New York [u.a.]: Harper, 1931.

Clemens, Clara. My Father Mark Twain: Illustrated from Family Photographs with Hitherto Unpublished Letters of Mark Twain / by Clara Clemens. 5. print. Harper, 1931.