APA (7th ed.) Citation

Todhunter, I. (1962). A history of the calculus of variations: During the nineteenth century. Chelsea Publ.Comp.

Chicago Style (17th ed.) Citation

Todhunter, Isaac. A History of the Calculus of Variations: During the Nineteenth Century. New York: Chelsea Publ.Comp, 1962.

MLA (9th ed.) Citation

Todhunter, Isaac. A History of the Calculus of Variations: During the Nineteenth Century. Chelsea Publ.Comp, 1962.