APA (7th ed.) Citation

Wallis, W. A., & Roberts, H. V. (1956). Statistics, a new approach. Free Press.

Chicago Style (17th ed.) Citation

Wallis, Wilson Allen, and Harry V. Roberts. Statistics, a New Approach. Glencoe: Free Press, 1956.

MLA (9th ed.) Citation

Wallis, Wilson Allen, and Harry V. Roberts. Statistics, a New Approach. Free Press, 1956.