Harris, H. H. (1959). The history and calculation of pi. Graduate Division of the Kansas State Teachers College.
Chicagoスタイル(17版)引用形式Harris, Herman H. The History and Calculation of Pi. Emporia: Graduate Division of the Kansas State Teachers College, 1959.
MLA(8版)引用形式Harris, Herman H. The History and Calculation of Pi. Graduate Division of the Kansas State Teachers College, 1959.
警告: この引用は必ずしも正確ではありません.