Dyfyniad APA

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

Dyfyniad Arddull Chicago

Wallis, W. Allen, and Harry V. Roberts. Statistics a New Approach. Nueva York: The Free, 1956.

Dyfyniad MLA

Wallis, W. Allen, and Harry V. Roberts. Statistics a New Approach. The Free, 1956.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.