Cita APA (7th ed.)

Hellwig, G. (1967). Differential operators of mathematical physics: An intro-. Addison-Wesley Pub. Co..

Cita Chicago (17th ed.)

Hellwig, Günter. Differential Operators of Mathematical Physics: An Intro-. Reading, Mass.: Addison-Wesley Pub. Co., 1967.

Cita MLA (9th ed.)

Hellwig, Günter. Differential Operators of Mathematical Physics: An Intro-. Addison-Wesley Pub. Co., 1967.