Harris, H. H. (1959). The history and calculation of pi. Graduate Division of the Kansas State Teachers College.
Chicago-стиль цитированияHarris, Herman H. The History and Calculation of Pi. Emporia: Graduate Division of the Kansas State Teachers College, 1959.
MLA-цитированиеHarris, Herman H. The History and Calculation of Pi. Graduate Division of the Kansas State Teachers College, 1959.
Предупреждение: эти цитированмия не могут быть всегда правильны на 100%.