Pars, L. A. (1965). An introduction to the calculus of variations. Heinemann.
Chicago Style (17th ed.) CitationPars, L. A. An Introduction to the Calculus of Variations. London: Heinemann, 1965.
MLA (9th ed.) CitationPars, L. A. An Introduction to the Calculus of Variations. Heinemann, 1965.