APA (7th ed.) Citation

Willers, F. A. (1923). Numerische Integration. Gruyter.

Chicago Style (17th ed.) Citation

Willers, Friedrich Adolf. Numerische Integration. Berlin [etc.]: Gruyter, 1923.

MLA (9th ed.) Citation

Willers, Friedrich Adolf. Numerische Integration. Gruyter, 1923.

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