APA (7th ed.) Citation

Shapiro, H. S. (1969). Smoothing and approximation of functions. Van Nostrand Reinhold.

Chicago Style (17th ed.) Citation

Shapiro, Harold S. Smoothing and Approximation of Functions. New York: Van Nostrand Reinhold, 1969.

MLA (8th ed.) Citation

Shapiro, Harold S. Smoothing and Approximation of Functions. Van Nostrand Reinhold, 1969.