Cita APA (7a ed.)

Bliss, G. A. (1946). Lectures on the calculus of variations. University Press.

Cita Chicago Style (17a ed.)

Bliss, Gilbert Ames. Lectures on the Calculus of Variations. Chicago [etc.]: University Press, 1946.

Cita MLA (9a ed.)

Bliss, Gilbert Ames. Lectures on the Calculus of Variations. University Press, 1946.