Forbes, W. Cameron
Houghton Mifflin, 1928
Buku Teks
Foreman, John
T. Fisher Unwin , 1906
Buku Teks
Santiago, Francisco
University of the Philippines, 1957
Buku Teks
Stow, Randolph, 1935-2010, author
Pan Books, 1982
Buku Teks
Francisco, Juan R., author
Linguistic Society of The Philippines, 1973
Buku Teks