Christhophersen, Paul, author
Longmans, Green, 1956
Buku Teks
Low, Ona, author
Edward Arnold, 1986
Buku Teks
Fowler, H. W. (Henry Watson), 1858-1933, author
At The Clarendon Press, 1954
Buku Teks
Fowler, H. W. (Henry Watson), 1858-1933, adapter
Clarendon Press, 1954
Buku Referensi
Oxford University Press, 1942
Buku Referensi