Cita APA (7th ed.)
Friedrichs, K. O. (1965). From Pythagoras to Einstein. Mathematical Association of America.
Cita Chicago (17th ed.)
Friedrichs, K. O. From Pythagoras to Einstein. Washington, D.C.: Mathematical Association of America, 1965.
Cita MLA (9th ed.)
Friedrichs, K. O. From Pythagoras to Einstein. Mathematical Association of America, 1965.
Atenció: Aquestes cites poden no estar 100% correctes.