APA (7th ed.) Citation

(1967). Mark Twain's letters to his publishers, 1867-1894 / Edited with an introd. by Hamlin Hill.

Chicago Style (17th ed.) Citation

Mark Twain's Letters to His Publishers, 1867-1894 / Edited with an Introd. by Hamlin Hill. 1967.

MLA (9th ed.) Citation

Mark Twain's Letters to His Publishers, 1867-1894 / Edited with an Introd. by Hamlin Hill. 1967.

Warning: These citations may not always be 100% accurate.