Marshall, Jock
Hodder and Stoughton, 1970
Buku Teks
Knapp, B.J., author
George Allen and Unwin, 1982
Buku Teks
White, Patrick, 1912-1990, author
Penguin Books, 1984
Koleksi Publik
Montagu, Ashley, 1905-1999, author
McGraw-Hill, 1983
Buku Teks
Weinberg, Meyer
Prentice Hall Inc., 1965
Buku Teks