Cita APA (7a ed.)

Singer, I. (1970). Best approximation in normed linear spaces by elements of linear subspaces. House of the Academy of the Socialist Republic of Romania ; Springer.

Cita Chicago Style (17a ed.)

Singer, Ivan. Best Approximation in Normed Linear Spaces by Elements of Linear Subspaces. Bucharest : Berlin [etc.]: House of the Academy of the Socialist Republic of Romania ; Springer, 1970.

Cita MLA (9a ed.)

Singer, Ivan. Best Approximation in Normed Linear Spaces by Elements of Linear Subspaces. House of the Academy of the Socialist Republic of Romania ; Springer, 1970.