APA Citation

Perry, E. L. J. ;. Understanding Elementary School Mathematics. Cummings Publishing Company, Inc., Menlo Park, California, 1972.

Chicago Style Citation

Perry, E. L. Jr.. Understanding Elementary School Mathematics. Cummings Publishing Company, Inc., Menlo Park, California, 1972.

MLA Citation

Perry, E. L. Jr.. Understanding Elementary School Mathematics. Cummings Publishing Company, Inc., Menlo Park, California, 1972.

Warning: These citations may not always be 100% accurate.