edited by James G. Porter
Angus & Robertson, 1983
Buku Referensi
José Rizal National Centennial Commission,, 1962.
Buku Teks
Runes, Dagobert D., author
Philosophical Library, 1959
Buku Referensi
Franklin, Benjamin, author
Liberal Arts Press, 1949
Buku Teks
Saito, Hirosi
Boston Marshall Jones 1935
Buku Teks