APA (7th ed.) Citation

Hardy, G. H., & Wright, E. M. (1979). An introduction to the theory of numbers (5a.). Clarendon.

Chicago Style (17th ed.) Citation

Hardy, Godfrey Harold, and Edward Maitland Wright. An Introduction to the Theory of Numbers. 5a. Oxford: Clarendon, 1979.

MLA (8th ed.) Citation

Hardy, Godfrey Harold, and Edward Maitland Wright. An Introduction to the Theory of Numbers. 5a. Clarendon, 1979.