Παραπομπή APA

Bolza, O. (1961). Lectures on the calculus of variations. Dover.

Παραπομπή Chicago Style

Bolza, Oskar. Lectures on the Calculus of Variations. New York: Dover, 1961.

Παραπομπή MLA

Bolza, Oskar. Lectures on the Calculus of Variations. Dover, 1961.