Macfadyen, A.
Pitman Publishing Corporation, 1963
Buku Teks
Boughey, Arthur S.
Dickenson , 1967
Buku Teks
Gleich, Michael; Maxeiner, Dirk; Miersch, Michael; Nicolay, Fabian
Atlantic Monthly Press, 2002
Buku Referensi
Usher, M.B.
Chapman and Hall , 1973
Buku Teks
[edited by] Charles W. Fowler, Tim D. Smith
John Wiley & Sons, 1981
Buku Teks