APA (7th ed.) Citation

Pars, L. A. (1962). An introduction to the calculus of variations (First published.). Heinemann.

Chicago Style (17th ed.) Citation

Pars, Leopold Alexander. An Introduction to the Calculus of Variations. First published. London [u.a.]: Heinemann, 1962.

MLA (9th ed.) Citation

Pars, Leopold Alexander. An Introduction to the Calculus of Variations. First published. Heinemann, 1962.

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