Hicks, George L., author
Cornell University Press, 1971
Buku Teks
Barnett, Harold J., author
John Hopkins Press, 1963
Buku Teks
Maisal, Sherman J., author
John Wiley & Sons, 1957
Buku Teks
Rowan, D.C., author
Macmillan, 1968
Buku Teks
Rowan, D.C., author
Macmillan, 1978
Buku Teks