APA (7th ed.) Citation
Hardy, G. H., & Wright, E. M. (1988). An introduction to the theory of numbers (5a ed.). Oxford University Press.
Chicago Style (17th ed.) Citation
Hardy, G. H., and E. M. Wright. An Introduction to the Theory of Numbers. 5a ed. Oxford: Oxford University Press, 1988.
MLA (9th ed.) Citation
Hardy, G. H., and E. M. Wright. An Introduction to the Theory of Numbers. 5a ed. Oxford University Press, 1988.
Warning: These citations may not always be 100% accurate.