Concise dictionary of American history
editor Thomas C. Cochran, Wayne Andrew
Charles Scribner's Sons , 1962
 Buku Referensi
Dictionary of American History: Aachen-Chattanooga Campaign
Charles Scribner's Sons, 1976
 Buku Referensi
Plano, Jack C.
The American political dictionary
Holt, Rinehart and Winston, 1985
 Buku Referensi
Kenyon, John Samuel
A pronouncing dictionary of American English
Merriam-Webster ; G. & C. Merriam Co., 1953
 Buku Referensi
Dictionary of American biography
Charles Scribner's Sons , 1981
 Buku Referensi