edited by Alfred W. McCoy and Ed. C. de Jesus
Ateneo De Manila, 1982
Buku Teks SO
Arcilla S.J, Jose S.
ADMU Press, 1998
Buku Teks SO
Scott, William Henry
New Day Publishers, 1982
Buku Teks SO
Francisco, Juan R.
Linguistic Society of The Philippines, 1973
Buku Teks SO
Forbes, W. Cameron
Houghton Mifflin, 1928
Buku Teks