Tolkien, J.R.R. (John Ronald Reuel), 1892-1973, author
Houghton Miffiln, 1987
Buku Teks
edited by Robert E. Beck
Academic Press, 1977
Buku Teks
Passman, Donald S., author
John Wiley & Sons, 1979
Buku Teks
Cohn, P.M., author
Academic Press, 1985
Buku Teks
Walter, Carlton H, author
McGraw-Hill, 1965
Buku Teks