Cita APA (7a ed.)

Sommerfeld, A., & Straus, E. G. (1949). Partial Differential Equations in Physics. Academic press.

Cita Chicago Style (17a ed.)

Sommerfeld, Arnold, y Ernest G. Straus. Partial Differential Equations in Physics. New York: Academic press, 1949.

Cita MLA (9a ed.)

Sommerfeld, Arnold, y Ernest G. Straus. Partial Differential Equations in Physics. Academic press, 1949.