Gaya APA

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

Gaya MLA

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