Roberts, Edgar V.
Prentice-Hall, 1977
Koleksi Publik
Barnet, Sylvan
Batsford Academic and Educational, 1985
Buku Teks
Barnet, Sylvan
Little, Brown, 1979
Buku Teks
Headrick, Paul, 1957-
Wiley-Blackwell, 2014
Buku Teks
Cooper, Louis Blom
Bodley Head, 1961
Buku Teks