APA (7th ed.) Citation

Ahlgren, G. H. (1951). Principles of weed control. John Wiley & Sons Inc.

Chicago Style (17th ed.) Citation

Ahlgren, Gilbert H. Principles of Weed Control. John Wiley & Sons Inc, 1951.

MLA (8th ed.) Citation

Ahlgren, Gilbert H. Principles of Weed Control. John Wiley & Sons Inc, 1951.

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