Lyons, John, author
New York Cambridge University Press 1992,
Buku Teks
Bloom, Lois
New York John Wiley & Sons 1978
Buku Teks
Nagoya, Japan : Department of Japanese Studies Nanzan University
Majalah, Jurnal, Buletin
Edward Arnold ,
Majalah, Jurnal, Buletin
Manuel, A. Arsenio
Manila: Filipiniana Publications, 1948
Buku Teks