Suzuki, Takao, author
Kodansha International, 1973
Buku Teks
Nakane, Chie, author
Penguin Books, 1981
Buku Teks
Alfonso, Anthony, author
Sophia University LL Center of Applied Linguistics, 1980
Buku Teks
Gilhooly, Helen, author
Kesaint Blanc, 2012
Buku Teks
Printing Bureau, Ministry of Finance , 1990
Buku Teks