Cita APA (7th ed.)

Richardson, C. H. (1954). An Introduction to the calculus of finite differences. Van Nostrand Reinhold.

Cita Chicago (17th ed.)

Richardson, Clarence H. An Introduction to the Calculus of Finite Differences. New York: Van Nostrand Reinhold, 1954.

Cita MLA (9th ed.)

Richardson, Clarence H. An Introduction to the Calculus of Finite Differences. Van Nostrand Reinhold, 1954.