Evans, Jessie Campbell, author
D.C. Heath, 1942
Buku Teks
Snyder, Louis L., author
Julian Messner, 1960
Buku Teks
Sharp, Walter R.
Rinehart, 1944
Buku Teks
Lentera Abadi, 2009
Buku Referensi
Teed, Peter, author
Oxford University Press , 1992
Buku Referensi