Cita APA

Sagan, H. (1969). Introduction to the calculus of variations. McGraw-Hill.

Citación estilo Chicago

Sagan, Hans. Introduction to the Calculus of Variations. McGraw-Hill, 1969.

Cita MLA

Sagan, Hans. Introduction to the Calculus of Variations. McGraw-Hill, 1969.

Warning: These citations may not always be 100% accurate.