Swetz, F., & Kao, T. I. (1977). Was Pythagoras Chinesen: An examination of right triangle theory in ancient China. Pennsylvania State University Press.
Citace podle Chicago (17th ed.)Swetz, Frank, a T. I. Kao. Was Pythagoras Chinesen: An Examination of Right Triangle Theory in Ancient China. University Park: Pennsylvania State University Press, 1977.
Citace podle MLA (9th ed.)Swetz, Frank, a T. I. Kao. Was Pythagoras Chinesen: An Examination of Right Triangle Theory in Ancient China. Pennsylvania State University Press, 1977.
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