Mr. Clemens and Mark Twain : a biography / Justin Kaplan. - N.Y. [et al.] : Simon & Schuster Paperbacks, 2006. - 424 p. + [8] incl. l. ill. ; 23 cm.см.. - (A Touchstone book : Biography). - ბიბლიოგრ.: გვ. 389-410. - ISBN 978-0-671-74807-4[MFN: 42241]