APA (7th ed.) Citation

Lorentz, G. G. (1986). Approximation of functions (2nd ed.). Chelsea.

Chicago Style (17th ed.) Citation

Lorentz, G. G. Approximation of Functions. 2nd ed. New York: Chelsea, 1986.

MLA (8th ed.) Citation

Lorentz, G. G. Approximation of Functions. 2nd ed. Chelsea, 1986.