Citazione Stile APA (7a Edizione)

Forray, M. J. (1968). Variational calculus in science and engineering. McGraw-Hill.

Citazione stile Chigago Style (17a edizione)

Forray, Marvin J. Variational Calculus in Science and Engineering. New York: McGraw-Hill, 1968.

Citatione MLA (9a ed.)

Forray, Marvin J. Variational Calculus in Science and Engineering. McGraw-Hill, 1968.