Knox, Paul, author
Edward Arnold , 1994
Buku Teks
Jones, Clarence Fielden
Macmillan, 1968
Buku Teks
Pounds, Norman J. G., author
Silver Burdett, 1980
Buku Teks
Stamp, L. Dudley (Laurence Dudley), 1898-1966, author
Methuen, 1950, 1952, 1967
Buku Teks
by Richard M. Highsmith, Jr.... [et.al.]
Prentice-Hall, 1961
Buku Teks