APA (7th ed.) Citation

University of Texas at Austin, National Science Foundation (U.S.), & Lorentz, G. G. (1973). Approximation theory. Academic Press.

Chicago Style (17th ed.) Citation

University of Texas at Austin, National Science Foundation (U.S.), and G. G. Lorentz. Approximation Theory. New York: Academic Press, 1973.

MLA (8th ed.) Citation

University of Texas at Austin, et al. Approximation Theory. Academic Press, 1973.