Dyfyniad APA

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

Dyfyniad Arddull Chicago

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

Dyfyniad MLA

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

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