APA (7th ed.) Citation

Bernstein, S., & La Vallée Poussin, C. J. d. (1970). L'Approximation. Chelsea Pub. Co..

Chicago Style (17th ed.) Citation

Bernstein, Serge, and Charles Jean de La Vallée Poussin. L'Approximation. Bronx, N.Y.: Chelsea Pub. Co., 1970.

MLA (9th ed.) Citation

Bernstein, Serge, and Charles Jean de La Vallée Poussin. L'Approximation. Chelsea Pub. Co., 1970.