Ryding, Karin C, author
Cambridge University Press, 2013
Buku Teks
Badawi, El-Said, author
Routledge, 2004
Buku Referensi
Kapliwatzky, Jochanan, author
Rubin Mass, 1954
Buku Referensi
Haywood, John A., author
Lund Humphries, 1965
Buku Teks
Thatcher, G.W., author
Frederick Ungar, [Date of publication not identified]
Buku Teks