Cita APA (7a ed.)

Steffensen, J. F. (1965). Interpolation (2nd ed.). Chelsea.

Cita Chicago Style (17a ed.)

Steffensen, Johan Frederik. Interpolation. 2nd ed. New York: Chelsea, 1965.

Cita MLA (9a ed.)

Steffensen, Johan Frederik. Interpolation. 2nd ed. Chelsea, 1965.