Cita APA (7th ed.)

Smith, M. G. (1967). Introduction to the theory of partial differential equations. D. van Nostrand.

Cita Chicago (17th ed.)

Smith, M. G. Introduction to the Theory of Partial Differential Equations. Londres: D. van Nostrand, 1967.

Cita MLA (9th ed.)

Smith, M. G. Introduction to the Theory of Partial Differential Equations. D. van Nostrand, 1967.