Bauer, George N.
D.C. Heath, 1932
Buku Teks
Ballou, Ronald H.
Ginn, 1943
Buku Teks
Nelson, Alfred L.
Harper & Brothers Publishing, 1943
Buku Teks
Rice, Bernard J.
Prindle, Weber & Schmidt, 1975
Buku Teks
Buchanan, Herbert E.
Johnson Pub., 1926
Buku Teks