APA (7th ed.) Citation

Rektorys, K. (1977). Variational methods in mathematics, science, and engineering. D. Reidel Pub. Co..

Chicago Style (17th ed.) Citation

Rektorys, Karel. Variational Methods in Mathematics, Science, and Engineering. Dordrecht ; Boston: D. Reidel Pub. Co., 1977.

MLA (9th ed.) Citation

Rektorys, Karel. Variational Methods in Mathematics, Science, and Engineering. D. Reidel Pub. Co., 1977.