APA Edition Citation

Hellwig, G. (1964). Differential operators of mathematical physics. Addison – Wesley.

Chicago Edition Citation

Hellwig, Gunter. Differential Operators of Mathematical Physics. Addison – Wesley, 1964.

MLA Edition Citation

Hellwig, Gunter. Differential Operators of Mathematical Physics. Addison – Wesley, 1964.

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