APA (7th ed.) Citation

Bell, E. D., Hansen, V. P., & Wisner, R. J. (1987). Essential skills for algebra. John Wiley.

Chicago Style (17th ed.) Citation

Bell, Evelyn D., Viggo P. Hansen, and Robert J. Wisner. Essential Skills for Algebra. New York: John Wiley, 1987.

MLA (9th ed.) Citation

Bell, Evelyn D., et al. Essential Skills for Algebra. John Wiley, 1987.