edited by J.K. Moorhead and Charles Lee
J.M. Dent and Sons, 1932
Buku Referensi
Bloomsbury, 1990
Buku Referensi
edited by Angela Partington
Oxford University Press, 1993
Buku Referensi
Eigen, Lewis D.
Macmillan, 1993
Buku Referensi
edited by A. Norman Jeffares and Martin Gray
HarperCollins, 1995
Buku Referensi