APA (7th ed.) Citation

Zimdhal, R. L. (1980). Weed crop competition. International plant protection center.

Chicago Style (17th ed.) Citation

Zimdhal, Robert L. Weed Crop Competition. International plant protection center, 1980.

MLA (8th ed.) Citation

Zimdhal, Robert L. Weed Crop Competition. International plant protection center, 1980.

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