Rose, Gerry, author
Macmillan, 1982
Buku Teks
Riley, Matilda White
Harcourt, Brace and world, 1963
Buku Teks
edited by Martin Bulmer
Macmillan, 1984
Buku Teks
Good, Carter V., author
Appleton Century Crofts, 1954
Buku Teks
Dorsey Press, 1970
Buku Teks