APA Style

Obunsha, . (1991). Shougakkou sansuu jiten-donna mondai mo surasura tokeru (小学算数事典―どんな問題もスラスラ解ける!) 4・5・6年用 . : Obunsha Education Information Center.

MLA Style

Obunsha, . "Shougakkou sansuu jiten-donna mondai mo surasura tokeru (小学算数事典―どんな問題もスラスラ解ける!) 4・5・6年用". : Obunsha Education Information Center, 1991. Text.