Gaya APA

Grossnickle, F, E., J., I, B, L. (1959). Discovering meanings in arithmetic . New York: New York: Holt, Rinehart and Winston; 1959.

Gaya MLA

Grossnickle, Foster, E.., J., I., Brueckner,, Leo. "Discovering meanings in arithmetic". New York: New York: Holt, Rinehart and Winston; 1959, 1959. Text.