Schawartz, Bernard, author
At The University Press, 1955
Buku Teks
Strong, Frank R., author
Dennis & Co., 1950
Buku Teks
Dowling, Noel T., author
Foundation Press, 1954
Buku Teks
Fairman, Charles, author
Henry Holt and Company, 1948
Buku Teks
Mason, Alpheus Thomas,1899-1989, author
Prentice-Hall, 1964
Buku Teks