Παραπομπή APA

Prestel, A., & Delzell, C. N. (2001). Positive polynomials: From Hilbert's 17th problem to real algebra. Springer.

Παραπομπή Chicago Style

Prestel, A., και Charles N. Delzell. Positive Polynomials: From Hilbert's 17th Problem to Real Algebra. Berlin ; New York: Springer, 2001.

Παραπομπή MLA

Prestel, A., και Charles N. Delzell. Positive Polynomials: From Hilbert's 17th Problem to Real Algebra. Springer, 2001.