(1990). 地域教材の開発と実践=: Development and practice of regional education materials. Japan: 土井庄一郎.
Dyfyniad Arddull ChicagoŜ�域教材の開発と実践=: Development and Practice of Regional Education Materials. Japan: 土井庄一郎, 1990.
Dyfyniad MLAŜ�域教材の開発と実践=: Development and Practice of Regional Education Materials. Japan: 土井庄一郎, 1990.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.