Rice, Bernard J., author
Prindle, Weber & Schmidt, 1975
Buku Teks
Buchanan, Herbert E., author
Johnson Pub., 1926
Buku Teks
Brink, Raymond
D. Appleton-Century Co., 1940
Buku Teks
Ballou, Ronald H., author
Ginn, 1943
Buku Teks
Bauer, George N., author
D.C. Heath, 1932
Buku Teks