Barnett, Frederic, author
Wadsworth, 1968
Buku Teks
Slonim, Morris James
Simon & Schuster , 1960
Buku Teks
McKillup, Steve, author
Cambridge University Press, 2011
Buku Teks
Watt, Roger, author
Sage, 2019
Buku Teks
Everitt, Brian S.
Edward Arnold , 1992
Buku Teks