APA引文

Elsgolts, L. (1970). Differential equations and the calculus of variations. Mir.

Chicago Edition Citation

Elsgolts, L. Differential Equations and the Calculus of Variations. Moscow: Mir, 1970.

MLA引文

Elsgolts, L. Differential Equations and the Calculus of Variations. Mir, 1970.

警告：這些引文格式不一定是100％准確.