Vance, Stanley C., author
Prentice-Hall, 1955
Buku Teks
planned and edited by John George Glover and William Bouck Cornell
Prentice-Hall, 1951
Buku Teks
Taussig, Frank William, author
Harvard University Press, 1934
Buku Teks
Malott, Deane W., author
McGraw-Hill, 1939
Buku Teks
Johnstone, Sydney J. (Sydney James), author
John Wiley & Sons, 1961
Buku Teks