APA (7th ed.) Citation

Hardy, G. H., & Wright, E. M. (1981). An introduction to the theory of numbers (ELBS ed. of 5th ed.). English Language Book Society and Oxford University Press.

Chicago Style (17th ed.) Citation

Hardy, G. H., and E. M. Wright. An Introduction to the Theory of Numbers. ELBS ed. of 5th ed. Oxford: English Language Book Society and Oxford University Press, 1981.

MLA (9th ed.) Citation

Hardy, G. H., and E. M. Wright. An Introduction to the Theory of Numbers. ELBS ed. of 5th ed. English Language Book Society and Oxford University Press, 1981.