Cita APA (7th ed.)

Schechter, R. S. (1967). The variational method in engineering. McGraw-Hill.

Cita Chicago (17th ed.)

Schechter, Robert Samuel. The Variational Method in Engineering. New York: McGraw-Hill, 1967.

Cita MLA (9th ed.)

Schechter, Robert Samuel. The Variational Method in Engineering. McGraw-Hill, 1967.