Mueller, F. J. (1965). Understanding the new elementary school Mathematics: A parent-teacher guide. Dickenson.
Cita Chicago (17th ed.)Mueller, Francis J. Understanding the New Elementary School Mathematics: A Parent-teacher Guide. California: Dickenson, 1965.
Cita MLA (9th ed.)Mueller, Francis J. Understanding the New Elementary School Mathematics: A Parent-teacher Guide. Dickenson, 1965.
Atenció: Aquestes cites poden no estar 100% correctes.