Yonezawa, Yoshiho
Kodansha International , 1979
Buku Referensi
Hooper-Greenhill, Eilean
Routledge, 1996
Buku Teks SO
Edson, Gary
Routledge, 1996
Buku Referensi
edited by Ulla Keding Olofsson ; illustrator, Teichert, Gerard
Unesco , 1979
Buku Teks SO
Edson, Gary
Routledge, 1994
Buku Teks SO