Sard, A. (1963). Linear approximation. American Mathematical Society.
Cita Chicago (17th ed.)Sard, Arthur. Linear Approximation. Providence, Rhode Island: American Mathematical Society, 1963.
Cita MLA (9th ed.)Sard, Arthur. Linear Approximation. American Mathematical Society, 1963.
Atenció: Aquestes cites poden no estar 100% correctes.