MLA

James, Gareth, et al. An Introduction to Statistical Learning : With Applications In R. Springer US, 2021.

APA

James, G., Hastie, T., Tibshirani, R., & Witten, D. (2021). An Introduction to Statistical Learning : With Applications in R. Springer US.

Chicago

James, Gareth, Trevor Hastie, Robert Tibshirani, and Daniela Witten. An Introduction to Statistical Learning : With Applications In R. : Springer US, 2021.