APA Edition Citation

Herrmann, D. L., & Sally, P. J. (2013). Number shape symetry.

Chicago Edition Citation

Herrmann, Diane L., and Paul J. Sally. Number Shape Symetry. CRC Press, London, 2013.

MLA Edition Citation

Herrmann, Diane L., and Paul J. Sally. Number Shape Symetry. 2013.

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