Cita APA (7th ed.)

Bliss, G. A. (1925). Calculus of variations (1a. ed.). Mathematical Association of America.

Cita Chicago (17th ed.)

Bliss, Gilbert Ames. Calculus of Variations. 1a. ed. LaSalle: Mathematical Association of America, 1925.

Cita MLA (9th ed.)

Bliss, Gilbert Ames. Calculus of Variations. 1a. ed. Mathematical Association of America, 1925.