Cita APA

El'sgol'ts, L. E., & El'sgol'ts, L. E. (1970). Differential equations and the calculus of variations. Moscow: Mir.

Citación estilo Chicago

El'sgol'ts, Levi Ernestovich, y Levi Ernestovich El'sgol'ts. Differential Equations and the Calculus of Variations. Moscow: Mir, 1970.

Cita MLA

El'sgol'ts, Levi Ernestovich, y Levi Ernestovich El'sgol'ts. Differential Equations and the Calculus of Variations. Moscow: Mir, 1970.

Precaución: Estas citas no son 100% exactas.