Johnston, B. L., & Richman, F. (1997). Numbers and symmetry: An introduction to algebra. CRC Press.
Chicago Style aipamenaJohnston, Bernard L., and Fred Richman. Numbers and Symmetry: An Introduction to Algebra. Boca Raton: CRC Press, 1997.
MLA aipamenaJohnston, Bernard L., and Fred Richman. Numbers and Symmetry: An Introduction to Algebra. CRC Press, 1997.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.