Gaya APA

Hiraku, T. (1991). What Are Numbers? A Child's First Mathematics Program (0 to 5) : 3 (cet.1). : Time life books.

Gaya MLA

Hiraku, Toyama. "What Are Numbers? A Child's First Mathematics Program (0 to 5) : 3". cet.1 : Time life books, 1991. Text.