Cita APA (7th ed.)
Barbeau, E. (2003). Pell's equation. Springer.
Cita Chicago (17th ed.)
Barbeau, Edward. Pell's Equation. New York: Springer, 2003.
Cita MLA (9th ed.)
Barbeau, Edward. Pell's Equation. Springer, 2003.
Atenció: Aquestes cites poden no estar 100% correctes.