Markos, Ni
Institute of Linguistics Philippine, 1966
Buku Teks
Buck, Pearl S. (Pearl Sydenstricker), 1892-1973, author
A. Signet Book, 1971
Buku Teks
Macarthur, J. R.
Appleton Century-Company, 1936
Buku Teks
Cook, Stanley
Penguin Book, 1945
Buku Teks
Hazairin, author
Tintamas, 1969
Buku Teks