APA (7th ed.) Citation

HELLWIG, G. Differential Operators of Mathematical Physics: An introduction. Addison Wesley Publishing Company.

Chicago Style (17th ed.) Citation

HELLWIG, Gunter. Differential Operators of Mathematical Physics: An Introduction. Addison Wesley Publishing Company.

MLA (8th ed.) Citation

HELLWIG, Gunter. Differential Operators of Mathematical Physics: An Introduction. Addison Wesley Publishing Company.

Warning: These citations may not always be 100% accurate.