Smellie, Kingsley Bryce, 1897-1987
Gerald Duckworth & Co,LTD, 1950
Buku Teks
Gooch, R.K. (Robert Kent), 1893-1982, author
D. Van Nostrad, 1937
Buku Teks
Stout, Hiram Miller, author
Oxford University Press, 1953
Buku Teks
Punnett, R.M., author
Dartmouth, 1994
Buku Teks
Moodie, Graeme C., author
Crowell, 1971
Buku Teks