Jennings, Gary
A Tom Doherty Associates Book, 1980
Buku Teks
Jarman, T.L.
The Cresset Press, 1955
Buku Teks
Quinn, Riley
Taylor and Francis, 2017
Buku Teks
Diggins, John Patrick
W.W Norton, 1992
Buku Teks SO
Todd, Lewis Paul
Harcourt, Brace & World, 1961
Buku Teks