Plumb, J.H. (John Harold), 1911-
Penguin Books , 1951
Buku Teks
Richetti, John
John Wiley & Sons, 2017
Buku Teks
edited by Clarence L. Barnhart
Appleton-Century-Crofts, 1956
Buku Referensi
Trevelyan, George Macaulay, 1876-1962
Longmans, Green, 1951
Buku Teks
Cambridge University Press, 2010
eBooks