Lester, Mark.

English Grammar Drills[electronic resources] / …で: Lester, Mark. (コンピュータ・メディア)

McGraw-Hill's essential ESL grammar[electronic resource] :a handbook for intermediate and advanced ESL students / …で: Lester, Mark. (コンピュータ・メディア)

McGraw-Hills Essential English Irregular Verbs[electronic resources] / …で: Franklin, Daniel.; Lester, Mark.; Yokota, Terry. (コンピュータ・メディア)