Cita APA (7th ed.)
Ivanov, O. A. Easy as pi?: An introduction to Higher Mathematics. Springer.
Cita Chicago (17th ed.)
Ivanov, Oleg A. Easy as Pi?: An Introduction to Higher Mathematics. Nueva York, EUA: Springer.
Cita MLA (9th ed.)
Ivanov, Oleg A. Easy as Pi?: An Introduction to Higher Mathematics. Springer.
Atenció: Aquestes cites poden no estar 100% correctes.