APA

Wallis W. A., Roberts H. V., . (1962). The nature of statistics. New York: Collier Books.

Chicago

Wallis W Allen, Roberts Harry V, . 1962. The nature of statistics. New York: Collier Books.

Harvard

Wallis W. A., Roberts H. V., . (1962). The nature of statistics. New York: Collier Books.

MLA

Wallis W Allen, Roberts Harry V, . The nature of statistics. New York: Collier Books. 1962.