APA citiranje

Beckmann, P. (1990). A history of PI. New York: Barnes & Noble Books.

Trích dẫn kiểu Chicago

Beckmann, Petr. A History of PI. New York: Barnes & Noble Books, 1990.

MLA citiranje

Beckmann, Petr. A History of PI. New York: Barnes & Noble Books, 1990.

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