Cita APA

Johnston, B. L., & Richman, F. (1997). Numbers and symmetry: An introduction to algebra.

Chicago Edition Citation

Johnston, Bernard L., i Fred Richman. Numbers and Symmetry: An Introduction to Algebra. CRC Press, New York, 1997.

Cita MLA

Johnston, Bernard L., i Fred Richman. Numbers and Symmetry: An Introduction to Algebra. 1997.