Foreman, John
T. Fisher Unwin , 1906
Buku Teks
edited by Alfred W. McCoy and Ed. C. de Jesus
Ateneo De Manila, 1982
Buku Teks
Arcilla S.J, Jose S.
ADMU Press, 1998
Buku Teks
Scott, William Henry, author
New Day Publishers, 1982
Buku Teks
Francisco, Juan R., author
Linguistic Society of The Philippines, 1973
Buku Teks