Ballou, Ronald H.
Ginn, 1943
Buku Teks
Davis, Hannibal Albert
American Book, 1933
Buku Teks
Nelson, Alfred L.
Harper & Brothers Publishing, 1943
Buku Teks
Rice, Bernard J.
Prindle, Weber & Schmidt, 1975
Buku Teks SO
Buchanan, Herbert E.
Johnson Pub., 1926
Buku Teks