Hermann,Robert. (1968). Differential geometry and the calculus of variations. Academic Press.
Cita Chicago Style (17a ed.)Hermann,Robert. Differential Geometry and the Calculus of Variations. New York: Academic Press, 1968.
Cita MLA (9a ed.)Hermann,Robert. Differential Geometry and the Calculus of Variations. Academic Press, 1968.
Nota: a formatação da citação pode não corresponder 100% ao definido pela respectiva norma.