Plamenatz, John
Longman, 1991
Buku Teks
Plamenatz, John
Longman Press, 1992
Buku Teks
Plamenatz, John
Longmen Press, 1993
Buku Teks
Ebenstein, William, author
Thomson Wadsworth, 2002
Buku Teks
edited by Isaac Kramnick
[publisher not identified], 1969
Buku Teks