Adams, James Truslow, author
1946
Buku Referensi
editor Thomas C. Cochran, Wayne Andrew
Charles Scribner's Sons , 1962
Buku Referensi
Charles Scribner's Sons, 1976
Buku Referensi
McCarthy, Eugene J.
Macmillan, 1962
Buku Teks
Makkai, Adam
Barrons, 1995
Buku Teks