Cita APA (7th ed.)

Postnikov, M. M. (1967). The variational theory of geodesics. W. B. Saunders.

Cita Chicago (17th ed.)

Postnikov, M. M. The Variational Theory of Geodesics. Filadelfia: W. B. Saunders, 1967.

Cita MLA (9th ed.)

Postnikov, M. M. The Variational Theory of Geodesics. W. B. Saunders, 1967.