Watt, Homer A., author
Barnes & Noble, 1957
Buku Referensi
Oxford University Press, 1942
Buku Referensi
Kamm, Antony, author
Harper Collins Pub., 1993
Buku Referensi
Steingass, F., author
Kegan Paul, Trench, Trubner & Co., 1947
Buku Referensi
Ricky Ganang, 1951-, author
National department for culture & Arts, 2009
Buku Referensi