APA (7th ed.) Citation

Hardy, G. H., Wright, E. M., Health-Brown, D., & Silverman, J. An introduction to the theory of numbers (6th edition.).

Chicago Style (17th ed.) Citation

Hardy, G. H., E. M. Wright, D.R Health-Brown, and J.H Silverman. An Introduction to the Theory of Numbers. 6th edition.

MLA (9th ed.) Citation

Hardy, G. H., et al. An Introduction to the Theory of Numbers. 6th edition.