APA (7th ed.) Citation

Hardy, G. H., & Wright, E. M. (1979). Theory of Numbers: An introduction to the theory of numbers (5th ed.). Clarendon Press.

Chicago Style (17th ed.) Citation

Hardy, G. H., and E. M. Wright. Theory of Numbers: An Introduction to the Theory of Numbers. 5th ed. Oxford: Clarendon Press, 1979.

MLA (9th ed.) Citation

Hardy, G. H., and E. M. Wright. Theory of Numbers: An Introduction to the Theory of Numbers. 5th ed. Clarendon Press, 1979.