Christian, James L. , author
Wadsworth and Cengage Learning, 2012
Buku Teks
Horner, Chris, author
Cambridge, 2004
Buku Teks
Foreign Languages Publishing House, 1892
Buku Teks
Mercado, Leonardo N.
Divino World University, 1977
Buku Teks
edited by Charles A. Moore
Princeton University Press, 1946
Buku Teks