APA (7th ed.) Citation

Snell, K. S., & Morgan, J. B. (1965). Elementary analysis. Pergamon Press.

Chicago Style (17th ed.) Citation

Snell, K. S., and J. B. Morgan. Elementary Analysis. Oxford: Pergamon Press, 1965.

MLA (9th ed.) Citation

Snell, K. S., and J. B. Morgan. Elementary Analysis. Pergamon Press, 1965.