Wynia, Gary W., author
Cambridge University Press , 1984
Buku Teks
Martin, Michael Rheta, author
The Bobbs Merrill, 1968
Buku Referensi
Wilgus, A. Curtis, author
Barner & Noble, 1963
Buku Teks
edited by W. Lee Baldwin and W. David Maxwell
Lexington Books, 1975
Buku Teks
edited with an introduction by R. A. Humphreys & John Lynch
Alfred A. Knopf, 1966
Buku Teks