APA (7th ed.) Citation

Skinner, B. F., & Vaughan, M. E. (1997). Enjoy old age: A practical guide : with a new preface. Norton.

Chicago Style (17th ed.) Citation

Skinner, B. F., and M. E. Vaughan. Enjoy Old Age: A Practical Guide : With a New Preface. New York ; London: Norton, 1997.

MLA (9th ed.) Citation

Skinner, B. F., and M. E. Vaughan. Enjoy Old Age: A Practical Guide : With a New Preface. Norton, 1997.