Schaaf, William L., author
Doubleday, 1962
Buku Teks
Court, Nathan Altshiller, author
Barnes and Noble, 1952
Buku Teks
Hart, William L., author
W.C. Heath, 1963
Buku Teks
Bowser, Edward A., author
D. Van Nostrand, 1893
Buku Teks
Carico, Charles C., author
John Wiley & Sons, 1980
Buku Teks