Yale University Press , 1950
Buku Teks
Beard, Charles A., author
Macmillan, 1948
Buku Teks
Liss, Sheldon B.
Westview Press, 1991
Buku Teks
Scott, Andrew M., author
Holt, Rinehart & Winston, 1959
Buku Teks
McGrath, Alister E., author
Wiley-Blackwell, 2011
Buku Teks