APA (7th ed.) Citation

(1991). Progress in approximation theory (1. print.). Acad. Press.

Chicago Style (17th ed.) Citation

Progress in Approximation Theory. 1. print. Boston [u.a.]: Acad. Press, 1991.

MLA (9th ed.) Citation

Progress in Approximation Theory. 1. print. Acad. Press, 1991.