APA (7th ed.) Citation

Hermann,Robert. (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.