Cita APA (7th ed.)
Brueckner, L. J., & Grossnickle, F. E. (1947). How to make arithmetic meaningful. John Winston Co..
Cita Chicago (17th ed.)
Brueckner, Leo J., i Foster E. Grossnickle. How to Make Arithmetic Meaningful. Philadelphia: John Winston Co., 1947.
Cita MLA (9th ed.)
Brueckner, Leo J., i Foster E. Grossnickle. How to Make Arithmetic Meaningful. John Winston Co., 1947.
Atenció: Aquestes cites poden no estar 100% correctes.