APA (7th ed.) Citation

Hermann, R. (1968). Differential geometry and the calculus of variations. Academic Press.

Chicago Style (17th ed.) Citation

Hermann, Robert. Differential Geometry and the Calculus of Variations. New York: Academic Press, 1968.

MLA (9th ed.) Citation

Hermann, Robert. Differential Geometry and the Calculus of Variations. Academic Press, 1968.

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