Παραπομπή APA

Nikishin, E. M., Sorokin, V. N., & Gelfand, S. I. (1991). Rational approximations and orthogonality. Providence, RI: American Mathematical Society.

Παραπομπή Chicago Style

Nikishin, E. M., V. N. Sorokin, and Sergei I. Gelfand. Rational Approximations and Orthogonality. Providence, RI: American Mathematical Society, 1991.

Παραπομπή MLA

Nikishin, E. M., V. N. Sorokin, and Sergei I. Gelfand. Rational Approximations and Orthogonality. Providence, RI: American Mathematical Society, 1991.

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