APA-viite

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

Chicago-tyylinen lähdeviittaus

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

MLA-viite

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