APA (7th ed.) Citation

Steffensen, J. F. (1950). Interpolation (2. ed.). Chelsea Publ. Co.

Chicago Style (17th ed.) Citation

Steffensen, Johan Frederik. Interpolation. 2. ed. New York, NY: Chelsea Publ. Co, 1950.

MLA (9th ed.) Citation

Steffensen, Johan Frederik. Interpolation. 2. ed. Chelsea Publ. Co, 1950.

Warning: These citations may not always be 100% accurate.