G. & C. Merriam, 1943
Buku Referensi
Springfield, Massacuset : G.& C. Merriam Co., Publishers, 1948.
Buku Teks
Merriam-Webster Inc., 1988
Buku Referensi
Hisamatsu, Senichi, author
Kodansha International, 1978
Buku Referensi
Hisamatsu, Senichi, author
Kodansha International, 1976
Buku Referensi