Παραπομπή σε μορφή APA (7η εκδ.)

Varga, R. S. (1979). Functional analysis and approximation theory in numerical analysis. Society for Industrial and Applied Mathematics.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Varga, Richard S. Functional Analysis and Approximation Theory in Numerical Analysis. Philadelphia: Society for Industrial and Applied Mathematics, 1979.

Παραπομπή σε μορφή MLA (8th εκδ.)

Varga, Richard S. Functional Analysis and Approximation Theory in Numerical Analysis. Society for Industrial and Applied Mathematics, 1979.