Dyfyniad APA

Harris, H. H. (1959). The history and calculation of pi. Graduate Division of the Kansas State Teachers College.

Dyfyniad Arddull Chicago

Harris, Herman H. The History and Calculation of Pi. Emporia: Graduate Division of the Kansas State Teachers College, 1959.

Dyfyniad MLA

Harris, Herman H. The History and Calculation of Pi. Graduate Division of the Kansas State Teachers College, 1959.

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