APA (7th ed.) Citation

Postnikov, M. M., & Gelbaum, B. R. e. (1967). The variational theory of geodesics. Sauders.

Chicago Style (17th ed.) Citation

Postnikov, Mikhail Mikhailovich, and Bernard R. ed Gelbaum. The Variational Theory of Geodesics. Philadelphia: Sauders, 1967.

MLA (9th ed.) Citation

Postnikov, Mikhail Mikhailovich, and Bernard R. ed Gelbaum. The Variational Theory of Geodesics. Sauders, 1967.