APA Citation

Zimdahl, R. L. (1980). Weed crop competition a review. (y.y): International Plant Protection Center Oregon State University.

Chicago Style Citation

Zimdahl, R. L. Weed Crop Competition a Review. (y.y): International Plant Protection Center Oregon State University, 1980.

MLA Citation

Zimdahl, R. L. Weed Crop Competition a Review. (y.y): International Plant Protection Center Oregon State University, 1980.

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