Singer, I. (1974). The theory of best approximation and functional analysis. Society for Industrial and Applied Mathematics.
Lua i Stíl Chicago (17ú heag.)Singer, Ivan. The Theory of Best Approximation and Functional Analysis. Philadelphia: Society for Industrial and Applied Mathematics, 1974.
Lua MLA (8ú heag.)Singer, Ivan. The Theory of Best Approximation and Functional Analysis. Society for Industrial and Applied Mathematics, 1974.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.