APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

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

MLA (9th ed.) Citation

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