Josef Rattner, Gerhard Danzer: Meister des grossen Humors: Entwürfe zu einer heiteren Lebens- und Weltanschauung. Königshausen & Neumann, 2008, ISBN 978-3-8260-3863-1 (google.de [abgerufen am 22. Januar 2023]).
Sylvia Ellis: Historical Dictionary of Anglo-American Relations (Band 10 von Historical Dictionaries of Diplomacy and Foreign Relations). Scarecrow Press, Lanham (MD) 2009, ISBN 978-0-8108-5564-9, S. 223
J. M. Hyson, S. D. Swank: Dr. Newell Sill Jenkins: progenitor of cosmetic dentistry. In: Journal of the California Dental Association. Band 31, Nummer 8, August 2003, S. 626–629, PMID 13677405.
Mrs. Jacques Samossoud Dies; Mark Twain’s Last Living Child. In: The New York Times. 21. November 1962 (Online – “San Diego, California, Nov. 20 (UPI) Mrs. Clara Langhorne Clemens Samossoud, the last living child of Mark Twain, died last night in Sharp Memorial Hospital. She was 88 years old.”).
