Babington, Anthony
Routledge , 1991
Buku Teks
Stewart, Robert B., author
Macmillan, 1939
Buku Teks
Zasloff, Joseph Jermiah, author
Verlagshaus Amerikanischen, 1952
Buku Teks
Sage Publications , 1992
Buku Teks
Matthews, Basil
Edinburgh House Press, 1927
Buku Teks