Buku Referensi
Morris, Edward E., author
Sydney University Press, 1972
Buku Referensi
Watt, Homer A., author
Barnes & Noble, 1957
Buku Referensi
Fowler, H. W. (Henry Watson), 1858-1933, author
New York Oxford University Press 1965
Buku Referensi
Steingass, F., author
Antarkarya, 1986
Buku Referensi