Benet, William Rose, author
Thomas Y. Crowell, 1965
Buku Referensi
Watt, Homer A., author
Barnes & Noble, 1957
Buku Referensi
revised by Ivor H. Evans
Cassell & Company, 1975
Buku Referensi
Mohamad Ngafenan, author
Dahara Prize, 1990
Buku Referensi
Hart, James, author
Oxford University Press, 1965
Buku Referensi